:D Congratulations, Sasso and LynnS! Harley and Bella sound like they, typical of Rotties, love to please and work hard to do it!
It's tons of fun to teach a Rott and they often "shine" in class! The Rotties in ANY of the classes I've taken/watched, always do well. Labs learn too, once they get the hang of it and stop jumping around. But there are a couple of other breeds I know I'd never want to own.