This biner is big and beefy. It has a noticeable heft to it and feels rock solid. It also has plenty of room and would probably be decent as a main point for big wall climbing (which I don't do, so that's speculation). I bought this after I had an auto-lock belay biner (Omega Pacific Jake) open on me while belaying a partner. Losing faith in auto-locks I feel very confident in the screw-lock version of this carabiner.
The red gate is great for reminding the user to twist the screwlock shut.
My major gripe is just how heavy it is especially since lighter 'biners in this size seem to be rated stronger. The attache is nearly a half oz lighter and big enough for most applications. I see this as maybe excelling in canyoneering, big wall, or rescue work where lots of ropes need to be tied into one spot, but for most it's overkill.