Strengths: Great microphone quality, very compact, stays perfectly stationary in my ear, very light, good battery life.

Weaknesses: A touch thin sounding at times.

Summary: This is a great headset. It does a fabulous job at picking up and transmitting my voice in many poor noise situations. It's very solid in-ear design makes me proud to be an design engineer :-) (no association with the company). The SM 100 fits easily into your ear with the quickest, simplest and smartest design. It uses a small rubber loop (3 sizes available in package) to gently hold the device in place by pushing against the rear lower inner part if your ear lobe. Very secure. I can whip my head around and the unit never moves. Many callers compliment that the sound quality they hear is excellent, except my wife for some reason. SInce I tend to test a lot of wierd devices, some people I call on the phone ask if I'm calling from home. That's really the ultimate compliment. As a reference I've owned the Motorola HS810 (3yrs), the Jabra 500 (6 mos.), and the original Plantronics 1000 (ugh). I have also tried the Motorola HS850, the Plantronics Voyager 320, the newer Motorola button looking thingy. None of those is as good. They all exhibit the same issue I have with most headsets - poor retention

Strengths: Clarity, light weight, stays put once you have it on, no flashing blue light.

Weaknesses: Sound quality (which is key).

Summary: My car has a lot of road noise (wind) at highway speeds. I couldn't hear my wife recently when talking to her using my current headset (which was a non-earbud type). I researched online and the reviews the SM100 got from people were fantastic. So I bought it. I bought 2. One for me, one for her. I have a Razr, she has a Blackberry Perl. Initially, it's nice. The environmental modes are neat but if I would use them, I'd use the lowest setting because they just give you a buzzing sound. It's kinda like the sound when a fax is trying to connect, but at a lower volume. The clarity of the unit is great. You can hear people very clearly. However, everyone I talked to sounded very tinny sounding. Like they were talking into a microphone. There was no depth to their voices. When you're driving at highway speeds, you lose part of your conversation since it's inaudible. Very frustrating since you concentrate more on listening than driving. That negates the purpose of having a handsfree cellphone and being able to concentrate on the road. My wife has a Blackberry Perl and she experienced the same issues as far as call quality. She also experienced a few convenience issues that came up. She could no longer adjust the volume on her calls using the scroll wheel on her phone when using the SM100. She had to do it using the SM100. She does like it for it's comfort. It stays put on her ear and I agree. It stays put once you have it on. All-in-all, if we were asked, I would not recommend it and she would not recommend it either.

Strengths: Size, comfort, battery life

Weaknesses: Sound quality

Summary: I find the unit great to wear with no over the ear clip and comfortable to wear for hours. The size is very unobtrusive and fits great into my laptop bag. Battery life has been very good for both use and standby. The listening sound quality is fair because of the "tinny" nature of the caller. This is also the single biggest complaint I hear from the person on the other end too. The review states the unit works well in a light breeze, however my callers have complained about my voice breaking up while outside walking.The unit does not allow for any volumes adjustments when connected to my MotoQ and any volume adjustments on my Pearl must be done on the unit not on the Pearl. The first unit I received would not allow any volume adjustments at all and was replaced by the manufacturer.Overall, I am disappointed with the unit and am looking at other models to replace my SoundID.

Strengths: Clear incoming and outgoing sound. Comfortable to wear. Noise cancellation technology works. Superior customer service. USB charger is great. Very comfortable to wear

Weaknesses: Environmental mode is useless due to excessive feedback. Small but bulky to put in a pocket. Sound is very clear, but definitely not as good as Jawbone. Mode button too easily accidentally pushed

Summary: Overall, great product. Definitely recommended. Would reccomend to change/alter mode button so that it is not accidentally pushed when device is in pocket. Comparison wise, it is definitely not as good as Jawbone especially in high wind/noise environ, but infintely more wearable (yes, I use the Jabra eargel solution to Jawbone too, but it is still too big for my ear).

Strengths: Small and light.Very good battery life.Good sound quality.Professional appearance.

Weaknesses: Personal Sound button easy to hit by accident.Lack of good storage option when not in use.

Summary: My primary need for a headset is in the car, and since I have a convertable I need one that can cope with noise. But I also have times in the office where I need to be on the phone and still have my hands free. In addition, I wanted small and light, good battery life, and didn't want to look like an escapee from the Borg Collective. I've been trying different headesets-- the SM-100 is the one I'm going to keep. It's small and light but still very secure in the ear. If you want extra security, they ship it with an optional over ear hook, but I don't see the need. I can't support the 8 hours talk time claim completely, but can say that I have gone for many hours of use between recharges. The headset is very unobtrusive. No long boom. No big flashing lights shouting "I'm a phone freak!" The buttons are tiny, but that is the price you pay for having a small headset. You will quickly get used to their layout and won't have any trouble selecting the function you want. It will take a bit longer to learn how to insert the SM-100 in your ear without pressing a button-- and the easiest one to hit seems to be the Personal Sound button which makes important changes to the settings (see below). Noise control is excellent. I haven't had any trouble hearing calls even on a busy highway with the windows down. People I am talking to have been able to understand me fine. One of my headset tests is to call my own voicemail and leave a message, and the SM-100 did the best job of making what I was saying clear without introducing distortions. All that said, be aware that this headset is not a noise eliminator. If you are in a noisy environment, the people you are talking to are going to know it. I will agree with other reviewers that Environmental Mode is annoying when in a quiet room. (I'd call it a hiss instead of a buzz, but by either name the noise is definitely there.) As soon as there is something that you want to listen to, Environmental Mode becomes much more useful. Try turning it on when having a ocnversation or listening to the radio in the car, and you mayl change your mind. You won't hear the hiss any more, and you will hear the conversation better. Just a quick tap or two on the Personal Sound button lets you quickly move between the settings. What isn't so obvious from the manual is that the Personal Sound button also changes you settings while you're on a call. People who have been reporting tinny sound or hard to hear calls, need to check this out. There are three different modes, and while I have one that is my usual favorite, I have noticed that if I am having a hard time hearing someone, it is worth trying the other settings. Again, just tap the Personal Sound button to switch.And that is one of the few "weaknesses" in the SM-100. I know in anything this size there are going to be design compromises, but for the first few days you'll be hitting the Personal Sound button by accident every time you adjust the SM-100's position in your ear. You'll get used to it, but if you think things don't sound as good as they did before, an accidental tap of the button is a likely cause. The other issue I am still wrestling with is where to put the SM-100 when it is not in my ear. It doesn't really fit in a shirt pocket comfortably. It's so small it can get lost on a busy desk. (And if you have cats, they'll think it is one of their toys if you leave it out.) I would like to have a travel case for it both as a place to keep it when I take it out and as a way to protect it in my laptop bag when travelling. (It would be a plus if the case also held the USB charger.) So, the SM-100 isn't perfect. But it's pretty darn good. If performance is important to you in choosing a BT headset, the SM-100 should definitely be on your list to try.

Strengths: Small, but not to small. Clear sound, fast connectivity to phone when call comes in or is made. Very comfortable.

Weaknesses: Plastic Body, but I guess it keeps the weight down. buttoms are upside down when I wear it on my right ear.

Summary: I wore this thing for 5 hours straight today. By the 2nd hour I pretty much forgot it was there. Made some test calls to people. They could hear me fine indoors and out, even with a slight breeze/wind blowing at me. They said they could hear the background noise, but my voice was definitely clear. As it stands right now, I am very pleased with this headset.