Tom,
I went to Oxford and had a thoroughly great time, worked hard and enjoyed the instructors.
What I cant tell you is what its like compared to any other schools because I've only been to Oxford. There are plenty on this forum who will knock OATS for whatever reason, but IMHO its a great place to go.
I suggest doing a search on OATS/Oxford and have a read, but be prepared to make yourself comfortable as youre in for a loooong night.
Cheers
TBL