Comfort: My main problem with this headset was that it is not very comfortable on my ear.  When I first got it, I couldn't wear it for more than 5-10 minutes.  Now that my ear has become accustomed to it, I can wear it for an hour or so.  It just takes getting used to.  However, I wish I could rotate the headset without rotating the earhook like some bluetooth headsets.  In order to have the headset have a tight grip on my ear (and not fall off), I have to rotate the headset so that it points upwards towards my eyebrows instead of downwards towards my mouth.  It's not really an inconvenience per se, but it looks pretty uncool.  Perhaps I have misshapen ears.