I had it done at Boots 8 years ago.
I used Boots for two reasons - (i) They had the best eye surgeon at the time (ii) One of my family worked there so I got a couple of quid off.
Totally painless, but unpleasant procedure.
I had one eye done twice, the other three times, but reached perfection in the end.
Would I recommend the procedure - No. Would I recommend the results - Definitely.