Don't want to put you off it, but have a good think about it before you decide for sure.
My Aunt had it done and raved about it so much, it really worked for her. Her friend, (not just on her recomendation, but I supose it must have swayed her a bit!), went and had it done too, and she's lost a lot of sight in one of her eyes. Now I don't know the full story, but something didn't work, and her eyesight in that eye is worse now than before she had it done.
Like any surgery, make sure you find a reputable surgeon, talk it thorugh with them, and have a serious think about it.
Remember it is your eyesight after all.
Good luck with the decision!