Funny this came up as I was about to post about it.
Been playing this all weekend on and off. I had to get to where I was on my second gaming PC at mum's which was annoying due to the cut scenes and story. I'm glad I did though as the game vastly improves the deeper you get in. I just did the mission into the archives underground and it was exceptional. Really brought back the creepiness feeling of going into a vault in Fallout 3. Tons more shooting and action too, I was worried it wouldn't pick up and was getting a little bored with just story.