I like my DD complete rifle. I consider better than a mass produced gun; but, I'm just an internet hero/armchair commando. You may ask some of the guys that run 'line' classes how they hold up, before you ask 'owners' on the web.
The guys that teach the rifle courses would be able to tell you how they/ and the rifles hold up before 99% on this forum could. You may try Ar15.com and see what the AR forums have up there.