Very pricey dinner, but well-worth it, I think. We ordered the seasonal discovery menu (without wine pairing), which consisted of 10 courses. I loved all of the dishes save for a couple--which weren't bad, but just not my "taste."
L'Atelier has a great setup and atmosphere--very noisy and lively. If you're looking for candlelit romance with white tablecloths and suit jackets, go next-door to its sister restaurant "Robuchon" (just be prepared to pay twice as much). Most of the seats are situated at a counter around the kitchen so you get to see the chefs in action. With the skill and precision they employ, it's almost like watching a doctor performing surgery. The chefs also serve you themselves and provide the details of each dish.