I can't say I care about the atmosphere...the main floor is very dark and it definitely doesn't inspire "romance." If you're self-conscious about how you're dressed, the lower level is more casual.
But the food is delicious. I've been there a few times and tried different pastas and they're all really good. The portions are large enough to have leftovers so it's worth the price.
Call ahead if you go during a holiday or a game day. It tends to be pretty busy during then.