Honestly, for me the biggest fear is that it won't work. I have failed so many times before, it's like I'm conditioned to expect failure. But I am refusing to let myself dwell on that. I've been slogging my way through my emotional food issues in hopes that it will help me succeed once I am banded. Plus I have been "speaking success" over this - telling myself and anyone who will listen about how positive this process is and how great it will be to lose the weight and keep it off. I am giving my fear over to the Lord, meditating on my success and allowing Him to provide it for me. Kind of like "let go let God" I guess.
Getting stuck does sound scary, but I think it'll be easier to deal with once it actually happens. The first time, all you have to do is remember not to panic, and then if it happens again you will know what to expect and how to handle it.
Great topic, by the way.