I have no real complaints about this phone other than the fact that bluetooth reception is absolutely horrid compared to the Samsung and POS Motorolas I've owned in the past. I've tried it with three different headsets, and each time the person on the other end says they can barely hear me and that I'm cutting out. This happens no matter how close the phone is to the headset.
Things are even worse when I try to run stereo bluetooth output to my Sony-Ericsson DS970. The sound is not only tinny and choppy, but it will cut out for seconds at a time. Not to mention that, for some reason, the music player won't play certain MP3s that always played fine on my M1.