I use Roadfly as well as Bimmerboard, here, the M5 Board. I collect lots of information from which to base a decision. I am still active there but - the quality of the users and the general demeanor is ugly. The users there are more interested in being "right" about something than helpful.
And they get pretty nasty when you challenge a post. They see the forum there as some sort of deathmatch where they have to have the ONLY right answer that they defend to the death - sometimes right, More often wrong.
Thats my opinion