Jawbone: the Bose of BT headsets!
Actually, I had better experiences with Bose then the Jawbone...
Jawbone did a great job of recording my voice. They were so good that people never raised their voice to talk to me, even when I was in a noisy environment. That leads to the first major complaint: I can't hear the other person!
What good does it do to have a hands-free headset that requires me to hold my hand up to my ear to push the headset into place and block out ambient noise? When I adjusted the ear loop to tighten the fit, it constricted against the back of my ear. When I contacted Jawbone about the low sound levels, they recommended that I buy an ear tip from their competitor. Say what? If you know your competitor makes a better ear tip, why not improve your own product?
The second issue is the terrible charging system. I used my headset so much that I had to charge it every day or at least every other day. The pins on the charger are prone to bending and being pushed in (then they no longer make contact). The adhesive used on the earpiece is too weak. After 100 or so charge cycles, the darned bond broke, making the earpiece pull apart unless I was very careful removing it.
These problems were not an anomaly. My first unit had all these problems. I liked the noise cancellation so much, though, that I bought a second unit. It had the same problems before simply refusing to charge anymore. I never bought a 3rd unit. Instead, I use the old reliable (but hated) ear bud attached to a cable.
If Jawbone came out with an IEM version with improved charging system, I'd love it! Until they address their two "killer defects", however, I'll pass on their product.