Groupon for La Piazza Pizzeria

There's a deal up on Groupon right now for La Piazza Pizzeria, the fairly new pizza place on Prospect Park West. Here's the deal:

* For $9, you get a punch card for five slices of pizza and five soft drinks (up to a $27.50 value).
* For $20, you get a full pie and two cans of soda (up to a $47 value).

Now here's the thing that caught my eye: a full pie and two cans of soda could potentially cost $47?! Indeed. La Piazza makes some Roman-style pizzas, which like Sicilian pies are rectangular, and they measure about 25 by 17 inches. They start at $26 for a three-cheese pie, and there are five that are $47 each. Has anyone tried one? I might be curious enough for a Groupon, but I'd love to hear some more on these huge pies.