I had one for a short while...
Forearm SUCKS - As mentioned, it's waaay too heavy.
Flip front sight - Best FFS I have owned, including YHM, PRI, and the new ARMS #41.
Barrel - There was some speculation as to who it was actually made by. Some said CMT/Stag, but GG&G denies that. I'd say it's no better than Stag though.
Upper Receiver - Again with the speculation, especially since the engraved "GG&G" on the side of the receiver is very similar in style and font to what LMT puts on theirs.
Bottom line, the forearm was a deal killer for me. Everything else ranged from good to great, but not worth it for me.