Fantastic!
Where to start?
The sound from the headphones is really good, and you can switch between several pre-recorded equaliser modes.
The microphone is also very good, surpassing some much more expensive wired headphones.
It's fairly light and easy to wear for several hours, and the battery life is excellent. The headphones themselves don't look cheap, and the buttons are well placed.
Even though the Bluetooth mode is very good, I'd still recommend using the dongle when you're playing and need the microphone, as in Bluetooth I had problems with deteriorating sound that disappeared in 2.4Ghz.
I highly recommend it, I'm really not disappointed with my purchase.