The venue is a bit confusing because it says Sienna Mercato on the outside. I had to check Google Maps to find out that Emporio was indeed on the inside. Better signage would help. The dining area is a bar-like scene, too noisy and dark for my taste but probably somewhat trendy to most folks.
The menu is pretty interesting. Basically, pick your meatballs, pick a sauce, and pick something on which to put the meatballs. I had french fry poutine with a spicy pork meatball on top. Menu prices seemed a tad upscale but may be fine for downtown Pittsburgh. However, I didn't think the food itself was all that remarkable once you get past the novelty.
Service was a bit spotty. They don't pay equal attention to every table, so when it was time to leave, it took us a while to get our checks.