One big issue for me was that you don't get the key to enter the building. You rely on a security person to be there to open you the door (and he's not always there).
And also one night someone was over and it was too loud till midnight, so I couldn't sleep. But after 12 it was quite, and other days were quiet as well.
I had no issues with late check in. It's a nice building, good location and the big window in a room is great. Not many street noises and the metro is very close. You get your own bathroom as well.