My dh had it done last year.
He was severely short sighted. -4 in one eye, -6 in the other. He wore contact lenses which had always been fine, but as he's in his 40s, he'd started to get long sighted and he was struggling to read with or without lenses.
He had LASIK and it has been a huge success. He had some sort of tweak to mean both his long and short sight are fine now. I think one eye was adjusted to correct the long sightedness (might have that wrong). So he's gone from being Mr Magoo to having 20/20 vision.
He had to wear his glasses for a week or so before surgery. He hated this as he was terribly self conscious about them and hadn't worn glasses outside the house for decades.
The immediate aftermath from the procedure was awful. Once the anaesthetic drops had worm off he was in complete agony, I have never seen him so distressed. But that bit only lasted about 3 hours. He was not nervous about the procedure, but I was there and thought it horrendous, but I'm really squeamish about eyes.
Despite this, he thinks it's the best thing ever and recommends it all the time. On a cosmetic triviality, his eyes (which always used to look a bit bloodshot) look really clear with gleaming whites - like a child's.