For the most part I am liking the game so far, well I have just played a 7 hour stint. The game does however have some issues.
1st the game engine is broken, anyone using an Nvidia card with Dx11, no matter how powerful will find out just how many glitches, stutters and issues their are oh and in game MSAA is plain broken. The game has the worst screen tearing I have ever seen. Most games I can happily play with Vsync off but this game is frankly sickening to look at with vsync off. Saying that though skip the in game settings and use Nvidia control panel to set AA, Vsync etc and the game looks great and runs happily ay 60FPS with everything maxed on my 670GTX.
2nd the game mechanics are a bit meh, the crafting system is clearly an artificial way to stop you becoming an uber warrior, the problem is it doesn't work as you could effectively go out and gain most of the stuff needed to craft all the unlocks right from the word go.
3rd the interface is horrible, the menu is laughable to navigate. Here's an example. You get hints at the side of the screen when unlocks become avaliable. You hit esc and get taken straight to the sub menu but to exit you then have to navigate through several menus to get back to the game, yeah it seems small and stupid but it is stuff like this that hampers the menu system in this game but the really weird thing is, even after several ours of gameplay the menu just feels so unintuitive.
4th set pieces; the on the rails sections so far their have been two maybe three that I've played. I hate them, they break the flow of the game and stand out like a sour thumb in what is meant to be an open world game.