I like my Jawbone better than most I've used (and returned).

Pros: The sound quality is good enough that it fools people into thinking that I am not on a headset. Pretty comfortable. In Washington State it becomes manditory to wear a headset while talking on a cell phone while driving after 7/1/08.

Cons: I've had two ear hooks break just swinging them onto my ear. Not forcing them the hooks broke right at the join between the headset and the hook. That part of the hook is not metal (the earhook is) just a tiny slice of plastic. Now down to my last two hooks. Unlike Jabra or Plantronic, you cannot purchase replacement hooks for cheap. Doesn't come with case of any kind so I use a small camera case and it stores my charger too. Does not cut wind noise, one of the main reasons I bought it.