I just recently bought one and have not hard wired it in yet (but will soon), still running it through the radio and plugging it into the aux plug. The unit itself seems to be pretty good and actually has more features than I've needed so far. My only complaint is it is like old AM radio, dropping out under bridges and tall trees, but there are several stations that I really enjoy on Sirius so I put up with it.
No longer president, River City Beemers
2009 R1200RT - Silver
"Shadowboxing the apocalypse, wandering the land"