Summary: i've owned the three previous Jawbone models. This is by far, the best. It syncs to two phones at the same time, which is important to me. I have both the gold and pearl, which look like accessories vs metal objects hanging out of my ears and the performance is outstanding. I was walking down a busy street last night and the party on the other end couldn't hear the street noise. It's a great device.
Pros: Clear Signal, Comfortable, Easy To Use, Good Sound, Good Volume Control, Lightweight, Long Battery Life
Summary: I have owned 2 Jawbone Aliphs over a 2 year period and the Plantronics Discovery 975 (for about 3 months), the Jawbone Icon blows them all away. seriously. I have 4 chilren and run a business from home. The Icon hides or disguises the majority of the background noise. It is easy to setup with my iPhone and the buttons are easy to use.
Pros: Clear Signal, Comfortable, Durable, Easy To Use, Good Sound, Good Volume Control, Lightweight, Long Battery Life