I have been to Cremant on several occasions -- in fact, it is a favorite date-night spot for my boyfriend and I, so long as our wallets allow.
The food is rich, but that is half the charm of such a wonderfully authentic French spot. I have become entranced by the French onion soup, which, although it might seem to be a simple thing to be raving over, is simply the best onion soup in the city, hands down.
The other menu item I am stuck on is the steakfrites, which is so satisfyingly gluttonous.
I love having a "French 75" cocktail, as well, or a glass of nice bubbly Cremant (their namesake -- I just learned that the other day!)
The chocolate cognac which another member alluded to is really rich and wonderfully fabulous for dessert, as is the creme brule.
If you haven't dropped into Cremant, you should definitely try it out! It is worth the money for a special occasion.