There are many good surgeons in Thailand. Suporn, Chettawut and a Sanguan are among the best surgeons in the world. If your friend is going to Thailand I would suggest she has a consultion with all three before making her decision.
I went to Suporn myself and the result is far better than I had dared hope for but it is very much a personal decision and I can't say my surgeon is the best cos I've only done this once.
Ann