13 Hours deep and just about 10 of those hours are gameplay and I still haven't been turned off by the terrible server and optimization. The game is profoundly glitchy and I absolutely wouldn't call it bug-free, but still People Can Fly have hit the mark for me with how amazing the gameplay and replayability factor is. I will for sure be playing this game multiple times over.
The one thing that I will say is a bit of a sad truth is their allowance of only 3 player co-op when there is 4 classes, but I understand the reason for it.
Thank you Square Enix and People Can Fly for providing me with a top shelf game in a year where absolutely no games are keeping my attention.
8/10 for me

Update: This game is absolutely amazing