i loved mt. sinai, they have a great rep and are known as "camp sinai" b/c the students are supposedly really happy. they have an awesome location and pretty good housing...
i can't remember all the other stuff about it, so i would say do a search on this website - there are tons of threads....
i know they are in a bit of trouble right now b/c of financial problems and scandals and whatnot - but opinions vary on what that means for the med school.
did you check the school website?
if you want a brief summary of schools to do a comparison, sign up on the princeton review website (free) and you can make a list of your potential schools. some of the info is outdated, but it gives you an idea...