I've used it for more than a year and I have no complaints. Haven't heard any complaints around the interwebs either. It's really been great. I don't stick to their recommended settings for my games but it's usually in the ballpark.
In 2014 sure but when it came out it was really awesome. I'm not going to argue that it's still a great shooter, (it isn't), but by the standards of the day it was incredible. I also had a PC and played the shit out of Duke Nukem 3D and Wolfenstein. I still prefered Golden Eye.
I wonder if its the firmware. Polygon reported that Dragon Age had huge problems on PS4 until they played it on a pre-2.0 console, where it ran great. The thing is though that Dragon Age isn't out for another week so they have time to make a fix for it before launch.