I honestly do think it's worth two credits, but I'd probably split them with another person.
We ate there in December (not on the dining plan), and I ordered the prix fixe menu which came with soup, salad, entree, and dessert. My sister ordered the cheese platter, and an entree. We then split the dessert. It was just way too much food for us. If my sister and I were going again we'd get two apps, split an entree, and then split dessret. So if we were on the plan we'd only have to pay for an additional app. Although, if I was dining with my DH or somebody else with a hearty appetite I don't think a split entree would satisfy them. Maybe we'd use the 2 credits for the prix fixe (and one of you get the soup and one get the salad), and then the second person order an additional entree.
You asked about atmosphere. It's not exactly romantic, I think the lighting level is a little high for that. It's still very nice though. Definitely give it a shot!The food is alone is definitely worth the two credits.