Hi,
slackadder! :o)
My boyfriend's cousin had hers done last year and now has 20/20 vision. Her prescription was high, too. Her mum was so impressed that she had hers done on Friday of last week and my boyfriend and his mum are both going together this Thursday to have theirs done, too. They're going with Ultralase, who are very reputable.
The family spent ages deciding who to go with before deciding on Ultralase. Their after care is brilliant; overly-'protective', which is no bad thing. You have to go back the day after, then a week after, then a month...
They're refreshingly honest, too, saying that not all patients are eligible for the procedure, unlike Optical Express who have also houded my boyfriend with no less than 20 phone calls since he looked into it.
You will get a free consultation where they will test your eyes for suitability. There are a few differing procedures, so they'll also tell you which you're eligible for, as well.
I think they're slightly more expensive than other companies, but, as I say, they're highly recommended.
Here is their FAQ page which should, hopefully, answer any of your questions.
Good luck with it. ws x