I have been reading FFS threads pretty much constantly over the last two years and I have found that doctors do make mistakes however many of the reports are because the person receiving the surgery didn't understand the surgery and as the result expected something they couldn't or didn't get. There are member who have faces so feminine that their face isn't the reason they don't pass but they put the blame for not passing on their face. It's important you understand exactly what the doctor is going to do and if you are unsure about it, delay the surgery until you are in agreement with the doctor.
Some doctors are known for producing one type of look and others a different look. Review the before and after carefully and you may see a pattern in the surgeons work. If you like the results, go with that surgeon. If you don't like it, look for a surgeon that produces the look you want.
It would be nice if it was easy selecting a FFS surgeon however it's pretty difficult. Take your time until you find exactly what you want.