Despite the intimidating reputation and stereotypes, there are lovely, humble people and the town is magical. If you really love theory and taking your subject to the deepest level, this is the place (for U.K). You will get to regularly talk to, be supervised by leading experts in your field – which are always fulfilling experiences! There are also plenty of activities for any student.
However, the teaching could be improved by making the syllabuses more up-to-date.