Le Serpent was hands down one of the best restaurants I've been to in any city. The food was absolutely incredible! I didn't even know that pork jowl could taste that good. This is a place where the portions aren't so large, and you'll definitely want to savor your food - because every bite is filled with flavor.
It's a little bit hard to find - the sign isn't terribly large, and it's on an industrial looking building. The ambience is very industrial, and the place is slightly crowded and relatively expensive. However, the food and service make this place totally worth the price.