You look amazing... way to go! You almost look TOO skinny! Yeesh!
As for the skin.... chump change as compared to the health benefits you've gotten (I'm sure) from this. And like other people above said, give it a few years to see just how much it'll get better on its own before you start thinking of anything else. I know that I personally will probably consider surgery, cos I know I'm gonna have some serious skin myself on my tummy.... but I'm not going to rush it.
Congrats again though!