I did my exams with Bristol and finished in Feb/March this year. I was happy with the product. The books and online material are both great. I showed them to a friend who is doing his ground school with CATS and he said the Bristol stuff is much user friendlier than the CATS material. Yes, CATS is cheaper. But cheaper doesn't always mean better!! Obviously, this only applies that you are looking at distance learning.. Full time, I have a few friends at Oxford who rave about their ground school. You're talking about £5k for the course though.