It was alright, but the Stan connecting with Steve formula is kind of getting old. I'm not a big fan of Back to The Future, but the references were few and in-between so I didn't feel flooded by them.
I really liked Francine and Roger's adventure ideas, and Haley proving she isn't boring. It's this kind of stuff that makes them different from Lois, Meg and Chris. They may not be the most popular, but they have thier own lives and personalities.
The Tortoise and the Hare joke felt very Family Guy-esque.