My girlfriend summed up everything that was both good and bad about Riazzi's with a single statement: "It's like Olive Garden, just without any of the things that suck about Olive Garden."
The flavors are good, the food well-prepared, but not spectacular. The architecture and the garden are interesting, the decor is flat. The service is good and personable, but not top-of-the-line professional.
It's a neighborhood restaurant with good (somewhat Americanized) Italian dishes served at a consistent quality, with a character that says nothing flashy - reminding you that this really is a satisfying, locally-owned Italian bistro.