I've tried the Motorola ones and either I couldn't hear or the person on the other end couldn't hear (usually both).  I bought this based on a recommendation of a Realtor that swore by it, and to be honest, I have only had occasional trouble with it.  It's comfortable to wear, it's easy to hear, the other person hears me.  I wear it most of the day, on project sites, while driving, even at home.  It works as expected and I'm very pleased with the results.  If you need a bluetooth, this is the one.