I had it back in 1999, and I am so glad I did. My vision was 20/400 before the surgery. I went through a very reputable doctor. He is now a part of the TLC network, and I believe they guarantee their work for life.
I was one of those rare cases where I had to have the surgery re-done. After a few months, I went from 20/20 to 20/40. I think it was because very soon after the surgery, I took antihistimines to help me sleep. It dried out my eyes and may have changed the shape of my newly shaven corneas. Or maybe it was because I had to use the computer so much at work. Anyway, I had the surgery done again free of charge about a year after the initial surgery.
I still have 20/20 vision, although now that I'm getting older, I'm starting to get farsighted. I also have a harder time seeing things at night and differentiating slight changes in colors. I get dry eyes at night, and have to keep eye drops handy while I'm sleeping. But that's all the downside I can think of. If you have the means to do it, and you are younger than 35, I'd say it is well worth it.