I've eaten there a few times, but usually it's as a treat meal! The prices are pretty reasonable in my opinon and the portions are huge!! The lunch size portions are more reasonable, if you choose one of those. Otherwise, you can almost be guaranteed to have some leftovers to take home with you.
I think the lunches run from around 10-12 dollars, more if you opt for a salmon dish, maybe, but still reasonable. They do have their healthier options, but they're still big. You could likely go for one of their salads with chicken, dressing on the side to be safe. Otherwise watch out for the side dishes. Sometimes they put something healthy like grilled salmon with the mashed potatoes which are, I'm sure loaded with butter and/or cream. But they're pretty good about substitutions so you could probably just get some steamed veggies instead.
The food is great and I love it there, just choose carefully and enjoy! Oh, and I almost never have the cheesecake....way too full for that, and not diet friendly.