I think a lot of people on here are expecting drastic aesthetic changes and this is more of a beauty forum, than functional reasons. However in my case, I saw a DRASTIC change in function. I had a 10 mm overbite, I could stick my thumb in between my upper and lower teeth at rest, and it possibly went to 15mm sitting down. Food fell out my mouth, I was chewing on the wrong teeth thus wearing it down, trouble speaking. I can now chew food properly. I'm still waiting for the 2nd part of my surgery to happen, as the surgeon gave up on me and didn't finish the operation.
The more skeletal change that happens, the more pleasing the aesthetic result will be.