I purchased this for a friend of mine that has a Motorola KAZR phone.  It works great with the phone and he his pleased with it which might not seem too impressive but this is a very picky person!  I have a couple of Scala headsets (500 & 700) and he didn't like those.  I showed him several others and he was always saying they are too big, didn't look right or some other problem with them.  He saw this one and decided it was the right one.  I ordered it for him and help him set it up with his phone (pretty easy setup) and he's been enjoying it ever since.