Thought I'd update this thread with my experience.
I had mine done yesterday at the London vision clinic in Harley Street and I really can't recommend it enough. It was quite a bit more expensive than a lot of the others (£4900) but the whole experience from start to finish was fantastic.
I'm someone who really, really doesn't like people going anywhere near my eyes - I can barely touch them myself, and certainly can't use contact lenses or anything like that, so I was expecting it to be a complete nightmare.
However, they make everything so easy and stress free - you see a variety of specialists, you're given loads of tests, and all the risks are explained clearly to you. In my case, as I've got pretty simple short sight, the risks were minimal.
You get loads of free coffee, chocolates, food etc throughout which is a nice touch, and you're even offered a massage before the surgery to relax.
My surgeon had done over 10,000 procedures and had worked on celebrities etc in the past, so I was fairly confident he knew what he was doing. The actual procedure only lasted a few minutes, and I was in a taxi home in only an hour or so. You notice an immediate improvement in vision, but your eyes are very sensitive and blurred for the first day, which is a bit disconcerting. You're told to expect that though, so it doesn't come as a surprise.
They give you all kinds of eye drops and medicines to take which is a bit of a hassle but obviously something you just have to do. The only real negative was the pain afterwards - immediately after the operation you only feel mild discomfort, but on my way home I was in very severe pain which I wasn't really prepared for. That subsided within a few hours though, so it wasn't a huge issue.
I'm now on my way back from the follow up appointment, where the surgeon said my eyes were healing really well. My vision now is 2 stages better than 20/20 which is really an amazing feeling, after spending so long wearing glasses. There's a few more check up appointments in the next few months, but they're not expecting any issues.
If you're thinking of having it done, I'd highly recommend this place.