I went there one time with a groupon. The place was dirty, the service was slow and either extremely understaffed or lazy. It took over an hour to get 1 pizza and it was not busy. That said, the pizza was delicious. It's still open so I'm thinking it could have just been a bad night on their end.
I haven't been to Double Dave's in more than 12 years, but their pepperoni rolls were really something special.