Having just finished a 3 year course at Cambridge and enjoyed it thouroughly I would reccommend it to anyone. I won't deny that there is a lot of hard work involved (especially if studying medicine as I was) but there is also a lot of fun to be had and loads of great opportunities academic, sporting and other. The collegic set up means that you have to apply to a college. Which college you go to can make a surprising difference to your life at the Uni, so it is worth carefully considering and visiting a few before you make your application.
Trailfinders have recently opened a branch in Cambridge (Bridge Street I think). I found them more than helpful. There were no queues the 3 times that I went, in stark contrast to STA down the road! They also had fares that the student travel agents seemed unable to obtain, which is surprising but worth knowing. Also you don't need to be a student to obtain these fares and it is well worth checking out. There is also a costa coffee shop on the same floor of Waterstones as Trailfinders, so there is somewhere to go and deliberate about your trip!