I own a pair of these. I loved them at first, they were comfortable, were great for running, and I liked the controls on the headphones. Then after just a few weeks they started having issues. Turning it on/off took several tries, buttons stopped responding, and then it started doing things on its own (stuck on fast forward, stuck on pause/play, etc.). It took me a while to get support from Motorola, and when I did, they "e-mailed" me about an exchange but I never got the email, and when I complained about it some weeks later, they refused to do much of anything until I ponied up money myself to send them my broken ones, at which time they would send me a replacement pair who knows how many weeks later.
Your mileage may vary, but this has made me not want anything Motorola ever.