I really like to support local, non-chain restaurants, but I can't support Zionsville Pizzeria anymore. Depending on the pizza you order, it can taste better than chains like Dominos, Papa Johns, etc. And the staff are very nice people.
However, their buffet really misses the mark.
Generally when someone goes to a buffet they are expecting to have a range of food readily available. We haven't found that to be the case here in the 3 times we've had their's (2 for dinner, 1 for lunch).
Their salad ingredients are skimpy, but that's fine since we're really going there for the pizza. As for pizza, we've never seen more than 2 pizzas out at the same time. So unless you want cheese or veggie, you'll have to wait, and it's not like they have lots of pies ready to be set out.
The nice thing is that staff want to please, so once they realize they are low on pizza they will ask what type we would like, but then they have to make it from scratch, so you have to wait ~15 minutes for it to cook. Once you have 2 or 3 families eating at the same time, a polite rush to the replenished pizzas ensues.
At $10 per person (dinner price), it's just not worth it.
If you want a pizza buffet in the area, your best bet is Roselli's on Michigan Ave. It only for lunch, but you'll have a continuous stream of 6 different pizzas. Lunch only, however.