Here is why Gennaro's gets three stars:
1.) Delivery or pick-up is fast, even late night (under 20 minutes).
2.) It's cheap.
3.) You can order online.
The pizza itself isn't anything to write home about. It's better than Papa John's but not as good as Domino's. (The only reason I'd go with Gennaro's over Domino's for cheap pizza is that Domino's is always at least twice as long to deliver as they say they will be.) If you go in for service, you will be disappointed--definitely had staff finish taking selfies and sending off texts before acknowledging that we were at the counter at all.
Overall, it's okay.