I have never had it done but I will say this my mother who has needed eye correction since childhood had it done a few months ago. She no longer needs eye correction and it went great. My hunting partener his wife had coke bottle glasses she was legally blind with out her glasses. She is 20/20 with no glasses I still can not get used to seeing her with out her coke bottle glasses.
I think it boils down to one thing a good doctor that knows what he is doing.