While any reason or concern we have is completely valid, the pro's outway the con's. Yes, you have to change the way you eat forever but with the strict diet phases over the first 4-8 weeks, you learn everything you need to know. The first month is the hardest. I was worried I wouldn't be disciplined enough to follow it but after 80% of your stomach is removed you really don't have a choice but to follow it. By the time your body allows you to tolerate more, you're already set up with those healthy habits. You can do this!