Brilliant tutors, who will give a lot of their time to help you. Resources are easy to access, and plenty of websites and people to help you find and use books / sites / articles etc. The array of subjects that one can choose from is suitable for virtually all interests. People claim that the pressure is high, and it is, but ultimately it is a chance for people to cultivate their resistance to stress and pressure - you are never forced to push yourself above what you are capable of.
At my college there are amazing facilities, free printing in my department, course books are available for free at pretty much any library, and the careers advisors are excellent. Also lots of opportunities for extracurriculars.