I absolutely love going to RHUL (especially this term, which as been amazing!).
I live in Founder's building and apart from the fact that I have to share a room (which I still hate!!) I have nothing to complain about. I've made quite a few friends on the corridors and I spend some lunch times sitting out in the corridor eating and having a laugh.
I think the university experience all depends on what you make of it. People complain about not having a night life at RHUL, but there is actually a pretty decent night life here, imo.
To tell you the truth, when I visited RHUL on the open day I didn't like it at all but I put it down as my insurance, anyway. I ended up coming here and I'm so glad I did. I have no regrets whatsoever.