I have a DPMS .308 and really like it. The biggest con that comes to mind is that it gets DIRTY very QUICKLY. I haven't put it through any sustained (100 rds or more) strings of fire and therefore have never had any issues as a result of it being dirty, I just know it gets dirty in a hurry. Here's a scan of 6x 3 shot groups. (loaded 18 rds in a mag and fired the groups... No time for cooling) Ammo was Federal Gold Medal Match 168 gr., range was 100 yards.
And here is my rifle.