I tried out DiAnoia's during the recent Restaurant Week and was pleasantly surprised. We made a reservation and were seated as soon as we arrived.
In my personal opinion, it was pretty pricey/upscale. I wasn't overwhelmed and don't feel the need to go back, but I definitely suggest trying it. I had the Gnocchi and Meatballs and it tasted homemade. There were eight members in my party and everyone enjoyed their meal. It was difficult to pay at the end of the meal, however, because they wouldn't accept more than one credit card with a certain amount of people there. I hope this changes at some point.
The restaurant was full, but the acoustics didn't make it feel overcrowded or loud.
I think the only thing to keep in mind is that they close at 9PM during the week, so planning a late dinner isn't the best idea or you'll be the only ones left in the restaurant.