We had a party of about a dozen coming in with very little notice after our wedding rehearsal for lunch. After calling a couple places in the area, Due Forni was the first that said they would be able to accommodate our party with no concerns and no additional wait. One might think that this means business was slow, but far from it - there were plenty of other customers there for Sunday brunch/lunch.
Service was great and attentive; no one seemed to run out of water during our meal. We had plenty of appetizers, all of which arrived at the table piping hot, and everyone was raving about the quality of the bread. For entrees, the majority of our party ordered pizzas (all were pleased with their choices), and some ordered gnocchi (rich, but the menu description makes that clear) and octopus (fantastic).
We had a little mishap during our lunch (a member of our party screamed in fright for reasons completely unrelated to the venue), which I think would have easily warranted some irritation, but the staff was really gracious and checked in on our guest to make sure she was okay.
On top of it all, prices were more than reasonable. Definitely a place I'd visit again whenever I'm next in Las Vegas.