Hi,
I had LASIK done in November and it has been a complete success. I was +3.50 in my right eye and +4.00 in my left - I now have no prescription whatsoever:-)
I had mine done at The Eye Clinic (they have nationwide branches) and was very impressed with the service that I got from start to finish. Everything was well explained - including the risks - and on the day of the surgery, I was made to feel very relaxed and was told what was happening at all times.
If you do have it done, which they won't do until you're 21, make sure that you feel comfortable with the surgery first.
Finally, in case you weren't aware, you have to wait 1 year before any applications for a Class 1 medical can be obtained.
Hope this helps
Matthew