I have, in fact, had LASIK (hence my vote for X-Ray Vision). Before surgery, I was somewhere in the -5 diopter range. In the 20/whatever scale, that's roughly 20/4,000,000. Ok, not really, but suffice to say I couldn't see much of anything without my glasses.
After the initial screenings, consent video, etc., I went in for the surgery on June 30, 2000. I was rather nervous (I mean, really, despite the very high success ratio, they're cutting on your eyes and it's just hard to get past that), but once the procedure started it wasn't bad at all. I won't go into detail for the sake of those monks who are squeamish (if you're curious, drop me a /msg and I'll be happy to discuss it), but suffice to say there was only a slight amount of discomfort, and I was seeing one hell of a lot better immediately and even better by the next day.
This past Friday I had my 3 month checkup and I was able to easily read the 20/15 line with either eye. Am I pleased? You bet.