Generic advice is to ask the doctor these essential questions

Thanks to ePatient Dave for these.
I've adapted them somewhat.
What is the success profile – percent who get total recovery, percent who are mostly recovered, partially, no relief?
Why does my diagnosis match to your estimate of recovery?
    How long does recovery take?
   How many cases have you done?
Has this hospital done?
        Don’t be shy about asking this!  Any good doctor will be happy to answer.