The gaps will be closed by pushing the teeth together and pulling them back slightly. If anything it should give you a nice lip line that is more symetrical and when you smile your upper lip will not have a tendency to roll up over your teeth. I've always seen an improvement in lip line...
The fee for express is lower because there are fewer aligners used and the case is not complex. Full cases for Invisalign allow for a few mid-course corrections, but Express does not. If changes are needed, there will likely be a fee.
The decision is up to each office.
Its a nice makeover to have your teeth straightened and whitened llike you've seen on Extreme makeover shows on TV. Straight white teeth are very youthfull and you'll love the result.
