i have the Rp1 system, had it for nearly a year, seems to work ok, i have a quest with motorbike mount, which i use with the connector plugged into the pmr cable, i only use the pmr when on long runs in groups, on the loudest setting i can hear ok up to about 80, though my helmet is a very noisy caberg j1, you can now get a radio from intaride, which can easy be set to 2w instead of 500mw as per uk law, mine was one of the early ones, which developed a fault, this was quickly fixed by intaride and they updated the software in the unit.