Hello Sharon,
I am currently in Bangkok at the moment and is undergoing FFS surgery in a few hours. I trust him because a few of my transgender friends also went to Dr Chettawut for FFS including Forehead reconstruction surgery. Their results came out beautiful but Dr Chettawut does his surgical procedure in asian standards which he might lack experience in beautifying facial with american standards.
I know a few girls who went to dr chettawut back in 2014 for FFS who are not asian and their FFS surgery came out beautifully especially the forehead.
I had some worries about my forehead and spoke with Dr Chettawut yesterday in regards to my forehead but he told me to hold off for it as he wants to see how i feel about my forehead after im healed completely and if I feel i still need scalp advancement which he didn't prefer the scalp advancement but hair transplant instead.
Hope this helps a little answer your question. I did meet a few girls yesterday waiting at Dr Chettawut's clinic who's surgeries were botched and came to see Dr Chettawut to see if he can fix the botched surgery that the previous doctor they went to have done.
Honestly, not many speaks or talks about Dr Chettawut's FFS skill but mostly on his great SRS skill. Hope once I heal up completely, I will be give answers to questions about Dr Chettawuts FFS skills.