I've been using them with my mates for the last couple of months, great bit of kit I've bluetoothed it to my iPhone 4 for music and calls and sat nav managed to stay in touch with other bikes upto a thousand metres away with good clarity, if you go for it make sure you get the set that has a USB connector to charge it so you can get firmware updates when they come out, just done update for 3.0 Bluetooth better battery life and new voice prompts hope this helps.