Any Regrets?

I am new to this site and have asked a couple of questions. But I think what I really would like to know is if there are any regrets to having the RNY. I have been reading some of the messages and everyone seems very upbeat and happy with what they had. I have my first apt in 2 weeks, do you have any suggestions as to what I should need to bring or ask? I have already had a sleep study this year. What should I expect the first visit. Thanks for any help.