LAP BAND
Revision from Lap Band to RNY is possible. Infact there are a lot of them performed. I am an RNY, but from what I understand and have witnessed Lap Banders "can" lose as well as RNY. The difference for me was the absorption issue. I also know that you can eat past the lap band. I needed something that would make me be more strict. Lap Band takes a little more self control. If you talk to a surgeon, they will recommend the best option for you. I also know that some insurance companies don't cover the lap band yet, but will cover RNY. I would HIGHLY recommend that you attend a seminar at CMMC. You have to register for it. It's free. They are very informative. They cover the different surgery options and tell you the pros and cons to each one. Why are you considering open instead of lap? Just curious.
Hope this helps a little. ;-)