My wife and I have a Honda Gold Wing. It has a hard-wired intercom system between driver and passenger. She recently got her motorcycle license and purchased a smaller bike. We purchased the scala rider Q2 set so we could continue enjoying our conversations while riding 2 bikes. I was amazed how good it works. When we take trips together on the Gold Wing now the Q2 system is the one we use. She also enjoys listening to the FM radio and using the bluetooth phone function in the system when riding by herself.

The ONLY gripe I have is the somewhat hard to remember different buttons to push for different periods. Anyway, I am happy with it, although it does not automatically connect with my Siemens phone when a call comes in, but that is more an issue of the phone than the headset. Other than that: Good sound. Kinda hard to get it under flip-up chin helmet though. Still a good product I would recommend.
Afterthought:
I have now used the headset with a Garmin Streetpilot 2820 - which I can only recommend - and it works great. No longer doe I need to keep my eyes on the GPS, but can hear where to go. From my point of view: The money was well spent on the teamset.