Laura welcome
I know some Dr Coburn and Dr Mumford patients, they seem to love their surgeons. I would write down all your questions prior to the appt and make sure you are comfortable with the surgeon. You are going to have a long relationship with this person. If you aren't completly happy with the answers, the clinic and the surgeon remember there are always other clinics you can visit too.
If I was doing this all over again I would ask the following (yes some are a little negative but I am a big believer in being prepared)
Who does the fills and what is the criteria for fills
What type of post op support does the clinic offer (nutritionist, fitness, counselling etc)
How many bands they have done
What is their percentage of complications over all
What type of complications they have dealt with
If you have a complication who pays to repair it you or them (not uncommon for the surgeon to donate their time but you pay the other staff for a greatly reduced rate)
If the band doesn't work out for you (ie you body reacts badly to the material or you just can't get it) what other options do they offer you
Do they do other weight loss surgerical options and what would it be like to have one done and exactly what other options do they off (RNY, DS, VBG,
Sleeve etc)
Beyond that all questions are fair game, but I think the above are things that in hindsight I would have like to know before I was banded 5 years ago.