As far as hospitals go, Mount Sinai is pretty standard. I have gone there to see a specialist and a few other times to visit a friend in the hospital. It's centrally located and easy to navigate, and the facilities seem pretty standard.
The one thing that completely threw me off was that on the "sabbath" (aka Saturday) the elevators stop on every floor due to the Jewish orthodox law. I had no idea what this was or why it was happening so I was freaking out thinking the elevators were all broken and took the stairs instead. Even if you're the only person in the elevator and go from the 8th floor to the lobby, the doors will open on every floor (even if no one is waiting). SO CREEPY.