I bought these around the first week of December '12. They sound great, the best bluetooth in ear headphones I've tried so far and I've tried a lot of them. I spend a lot of time in the gym so having no wires is important to me. An even BIGGER plus is the unit can be worn over or under ear. Over-ear is perfect for the gym while lifting weights especially for squats or any behind the neck exercise(s). I have a slight problem with them staying in my ear and I've tried all the tips that come with the unit. I always have trouble with ear buds staying in without having to give them a push or two here and there. I've noticed they are a little finicky while in the parking lot at several gyms the connection tends to go in and out but while inside the gym and else where I have not had any connection issues. I've only paired them with my iPod nano(new generation). They can be paired up to 8 devices which is another nice feature. They are very comfortable, I can't say that enough. I wish the case was a soft case but that is a minor detail.
Bought these to use mainly with my iPad. I stream a lot of TV shows and movies. Unfortunately using WiFi (streaming) and Bluetooth (headphones) at the same time can be problematic. From what I've read the Bluetooth signal uses the 2.4gHz band, so unless you are able to select the 5gHz band for your WiFi signal, there will be conflicts. My WiFi and Bluetooth signals constantly fought each other causing poor streaming and frequent popping in the headphones. Overall though the headphones looked and fit nice. They sounded good too when listening to music with my iPhone. So depending on you plans these are great for stored music files but not so good for streaming.
I have owned mine for three months. I found the fitting process time consuming. What makes these phones different other than the bluetooth is that they are heavier than other phones. I was hopping that I could use them while running without them falling out of my ear canals, but no such luck. They are expensive and work well but the sound is not as clear or neutral as others. In the end I wear them around the house or outside in the yard, but for sheer pleasure the Etymotic mc5 at under $100 are my favorites both for sound and comfort.