I had a tummy tuck nearly two years ago. I wouldn't say it changed my life. It did what I expected and wanted...give me the flat stomach I had before children.  
 
I had the surgery because I have worked out for years, after having my children, and I just couldn't get rid of the c-section pouch... or flab. Would I do it again? Without question. I really feel it is one of the best things I have ever done for myself, and undoubtedly, the most selfish. However, if I only do one selfish thing in my lifetime, I think this isn't a bad thing.  
 
I don't believe in plastic surgery because a person thinks it will completely change their life. I really feel anyone doing this should have already exhausted all other options, paying attention to the reasons behind the desire for the change. It isn't a quick fix. To maintain the results, you really do have to committ yourself to a lifestyle change. Having said that, I would encourage anyone contemplating surgery to go for it, if it's for the right reasons. I have no regrets!