I had it done in 2005 at Moorfields Eye Hospital in London. I did a lot of research beforehand and paid top-dollar to have the very best surgeon and technology that money could buy. To be fair, I enjoyed amazingly good vision for about the next eight years, then I began to need glasses for reading (which was inevitable as we all tend to get short-sighted as we age). One year ago, my distance (and night) vision began to deteriorate markedly. The speed that it worsened was really quite scary and I now again need to wear glasses full-time to correct my eyesight (I'm not a suitable candidate for further laser-surgery). Trouble is, over the past week, I find myself struggling to see things clearly and I'm pretty sure I'll have to have my prescription increased.
Now, I'm not saying all, or any of this is as a result of the laser-surgery, but I do think there should be more studies of the long-term implications of it.