So, I just finished this. I played it through on hard, so it took me a little while longer than it probably should have done. I died. Pretty frequently.
I thought Columbia was pretty damn beautiful, and liked how everything was built.
Story was enjoyable. I thought the pacing was fine, though I can see why others thought it slowed down somewhat in the middle.
The combat blew me away, to be honest. I went into it expecting gunplay similar to the original, but this was so much better. The selection of weapons was good, and the Vigors were different enough from each other to keep things interesting.
I think they got the AI for Elizabeth pretty much spot on, as she was never really getting in my way, and was throwing me stuff when I needed it. She only got stuck once, and blocked me in once, but both of them were right after an autosave, so it didn't really bother me.
Now all that's left for me to do is replay it on 1999 mode, but I think I'm gonna have a couple days gap before I start so I don't burn myself out.
I need sleep, I've been keeping myself awake too long to play this, but that's a good thing I guess. It certainly kept me hooked.