Get braces! I just got out of one thing and I get into other... Had I known braces would be so effective to stop eating I would have get them before :P All my mouth hurts and since I have to wash my teeth after eating and after brushing 10 times in a day I found it to be very frustrating so now I'm just not eating between meals and chewing reaaaaaally slowly.. and I've drop another 2 pounds already :) But I didn't get the braces to lose weight... I had to get them and I've been postponing it for years... but they're so necessary now that I had to say yes.
My advice? don't get the balloon... get braces!