Among the issues in the other reviews problems with this PC-Version: I can not confirm.
The download is very large, that's true. 43.6 GB. Took me almost 11 hours. It is possible to interrupt the download and download the game piecemeal. You get delivered a plastic bag and in it there is a single list with the Steam-code it in this version of the game. Instructions Manual or there is none, but that is now, unfortunately, standard. Registering key via Steam works without problems.
After downloading you can play immediately. No further installation required. The game runs flawlessly, without any jerkiness without crashes. Have all the graphics settings on max. provided and to test all the anti-aliasing settings listed in the graphics options also on max. drawn. Even running properly, without any lag. The graphics are correspondingly impressive.
My PC is already almost a year old, so I raised in the other reviews surprised some problems. These do not exist at least for me:
Intel Xeon E3-1230 v3, 4x 3.30GHz,
G.Skill Ares DIMM kit 16GB, DDR3-1600,
Sapphire Radeon R9 290X Tri-X OC, 4GB GDDR5
The game is installed on the HDD, the SSD remains free me from playing.