I did this 3 years ago (May 17th 2004 to be exact) - I am SO glad that I did it and consider it money very well spent. I paid $3000.
My prescription was -8.00 in one eye and -8.50 in the other eye. It is an undescribable experience to wake up in the middle of the night and be able to read (heck, to be able to SEE) the alarm clock
I had no complications. They sent me home with T3 and sleeping pills but I didn't need either. My eyes were a little light sensitive the first few days and quite watery, but that was the worst of it. I was given permission to drive again at my 72 hour appointment.

from me!