I had it done.£3000 privately 2 years ago and worth every penny.dont skimp where eyes are concerned.divide the cost between the next 20-30 years of your life and how much decent specs/contacts etc cost for that time.not much in it.
its not painfull,(cheaper options are tho) but i found it really bizzare, like being in a sci fi movie, all these sounds and blurry things happening in your field of vision.
my eyesight is now better than 20/20.there is virtually no measurable perscription.
cant recommend it enough.do your research, pay good money and enjoy.
ps it doesnt stop you developing the need for reading glasses as you get older tho, if that happens to you.