My buddies and I played a good 20 hours or so across the early access period. Aimbot AI, glitchy responsiveness to shouts/flashbangs/crowd control, magic bullets blasting out of their chests when hands were behind their backs...
We went back to playing Swat 4 Gold with mods and literally never looked back.
Edit: For some constructive criticism the game looks, sounds and feels amazing to play. The guns are awesome -- all of them. Very, very intense firefights when the game is functioning on all cylinders without hiccups. But the maps are /huge/, a pain in the ass to 100% (heard they fixed this in 1.0) and can really drag on and on with some guy you missed hiding in the rafters near spawn when you're 1km away in some tunnel somewhere looking for evidence.
Since only from below can one better see the heights.
http://i.imgur.com/OhZgm.jpg