I just had the PRK, and am very pleased with it, not cheap, but worth every penny
I too investigated it, but never, ever considered one of the cheapie eyes, as without my eyes, I would be very sad
I was also lucky, a buddy is a partner in the clinic who did mine, and even though he doesn't do that surgery, I knew he wouldn't lead me wrong, as, like many others, he relies on me to find parts for his Porsches