"I have mixed opinions regarding as you will read."2.5 starson by todd.mirkin
Pros: It's easy to setup, comfortable to wear even on long drives, very clear sound on the person you are callings end. I've been told it doesn't sound like I'm on a bluetooth headset.
Cons: LOTS of noise in the background. At times it's barely noticeable and at other times it can drown out the sound of the person I'm talking too.
Summary: IMO it's not worth the $60-70 price due the only con being a HUGE one. A lot of people talk about it not being able to control music and some other iphone commands but most headsets that do that are considerably more expensive so I didn't hold that against the M100.