The concept is great. You get all-you-can-eat pizza, pasta and dessert for $4.99 (adults) and 2.99 (kids) 3 and under eat free.
I went with my wife and kids this past week, it was good. The guy who greeted us as we walked in was nice, he said "hi" and explained the way the place works. He took our order, and let our kids in free. The staff was helpful, I asked for a couple pizzas that weren't on the buffet and they were out and ready to eat in 5 min. or so.
The only beef I had was that the pizzas on the buffet when we arrived weren't very fresh. Some of them could have been combined with others to make room for some new pies. Beyond that, our kids had a blast, we ate as much as we wanted and we left happy.
We'll be returning soon, I'm sure.