I too bought the Jawbone 2 with high hopes and was flabbergasted at the horrible sound quality, like listening to someone on a really lousy intercom.
Well, I went to the AT&T store to by a replacement unit on the slim chance I had gotten a defective unit -- after all the reviews and fanfare and the way my Jawbone original had performed it made no sense that it could be so horrible...
And, sure enough, the store manager told me that the first batch of Jawbone 2s they had received were almost entirely defective! He said out of the first ten they sold, seven came back within a few days -- all with the same complaint about the sound quality being like a cheap intercom with lots of static. He said he had to explain this problem and show the numbers to the Jawbone rep, and that this new, recent batch had not had any of those problems or complaints or returns as yet. And, sure enough, I haven't had any of those problems with my replacement unit.
I have had DIFFERENT problems, though, which I don't see ever being resolved and which I'm amazed I don't see anyone mentioning in any forum threads or reviews. One is this issue of touching the cheek, which it seems can sometimes be resolve by rotating the unit in the ear so that it points higher or lower on the side of the face -- it seems a little higher or lower raises it off the cheek and you have to play with it to find the sweet spot and then replicate it.
The main issues I have, which have me close to giving up on it completely, are:
Any pressure on any place on the entire faceplate from end to end and tip to tip results in a button click, and this is causing me to disconnect callers inadvertently more often than not whenever I try to grab it in order to wiggle it to get it snugly into my ear -- even though I try to grab t from the sides near the earpiece and try really hard to avoid touching the faceplate at all (and I have average sized fingers and am a martial artist with superb manual dexterity). In fact, pressing the Noise Assassin button with considerable pressure will inadvertently result in a press of the Talk button for this reason as well. Very bad since pressing the Talk button is how calls are ENDED!
If it had a spring to keep the voice sensor against the cheek, this need to really manipulate it into a snug position in the ear wouldn't be so important, but it doesn't have a spring and thus you must snug it up so the voice sensor can stay against the cheek!
Note that upon talking with their tech support, the tech conceded -- quite graciously, I might add -- that this issue of inadvertently clicking the Talk button when trying to just grab the sides of the unit and manipulate the unit into the ear was definitely a design flaw that they had become well aware of at tech support.
Another design flaw, by the way, is that when you're on a call and the Jawbone is on, regardless of whether the handset is activated or the Jawbone is activated at the time, the Jawbone stops giving you the blinking white light that tells you the unit is powered on. You have to either guess or go through the step of turning it off-or-on (pot luck) just to find out if it was on or not in the first place.
Really bad designing of this thing... in spite of all the fanfare, aesthetics, and sophisticated noise cancelling technology. They forgot to ever field test the **** thing before going to production and marketing! What a shame. It should be the hands-down choice for a businessperson wanted top notch performance and practicality in actual use, yet I've gotten to where I'm about ready to give up on using it at all and am now hunting for a viable alternative.
Hopefully soon there will be a new model with not only a spring to keep it against the cheek (what an amazing act of neglect on their part to omit it in the Jawbone 2 when it worked so functionally in the original Jawbone and when it's so obviously necessary) but also fixes for these other issues -- especially that it's so difficult to grab it and snug it into your ear without inadvertently clicking the Talk button and disconnecting the call you're on!