I have several stereo bluetooth headsets that I use for different activities - but the pair I use the most often are my Motorokr S9's. Here are my thoughts on the product:Pros:+ They fit my head pretty well and I can get them on/off with one hand+ The play/stop volume controls work with all of the iP* devices I have tried (iPhone 3GS, 4, iPad, iPod Touch)+ Zero issues pairing with all devices I've tried [ including iPhone 4 ]+ The buttons are easy to find and use+ The unit has been durable for me, I've had mine for a few years without any functional hiccups+ They use a standard mini-USB jack to charge, so losing the original charger isn't a huge issue (laptop charges work well)Cons:- The blinking light at the back that shows it is connected is unnecessary and a distraction at night- The USB port cover broke off a few years ago - still functions fine though- While they are great for walking around/sitting, you can't lay down with these headphones- If anyone is working a microwave within 50ft you may as well turn them off- They aren't 100% stationary on my head while running [probably varies head-to-head]Overall I'm pleased with the headset. I've run into strangers on the street that have told me their pair broke and Motorola sent them a newer version, but mine have been just fine. The only real issue is not being able to use them when resting. I know that headsets are incredibly subjective [ sound quality, ear fit ], but I would buy these again and recommend them to others.