Sienna Mercato is no joke! I've been there a handful of times and haven't disappointed yet. They have their standard meatball offerings, as well as a monthly meatball special. I've gotten several combinations of meatballs and sauces and they've all been terrifc. Although the special stuffed pepper meatball was delicious, I would have to say my favorite combination is the classic beef and tomato sauce. It is done well, and it stands on its own. Also, they have a friend pepperoni ball appetizer that is so, so, so good! I could eat two orders myself (and there's a decent amount of time). The beer list doesn't wow, but they do have delicious cocktails, and the bartender made us ad hoc sangria, even though it wasn't on the menu. I would go every week if I could!