This has become my go-to pizza spot in the south side for 3 reasons. I'll expand below.
1. It's fast and easy to order (online)
2. The price is great for the amount of food you get
3. The food is consistently good
1. The online ordering is efficient and I've never had to deal with showing up at the store and them not having my order ready. You can order from your desktop or mobile. The order process is easy and you can pay with your card or select paying with cash.
2. I've tried many other pizza places in the south side area who charge $20+ for a large pizza that really isn't that great. Gennaro's allows you to get a large amount of food for under $20. My go-to order is a 1 topping medium pizza and 1 order of cheese twists (think pepperoni roll type of goodness). The total is just over $19 which is a great deal. The hoagies there are also HUGE if you get the full size.
3. The food is good. Not great, certainly not horrible but it's good. The crust is usually soft and they have a good cheese to sauce ratio for my liking. I've only had the red sauce selection so I can't speak to the many specialty white pizzas they offer. The twists are delicious and make a great addition to any order. The breadsticks are big and fluffy. The only item that I had and would not get again are the wings. The wings were basically deep fried wings with bbq sauce poured over them, they didn't take the time to toss them and get them nice and saucy.
Overall if you're looking for solid affordable pizza in the south side Gennaro's is a great option.