The food at Chez Chili was authentic despite what their Coca-Cola style sign might suggest. I wouldn't say it's the best Chinese food I've had but then again it's hard to find something decent in Montreal.
The Ma Po Tofu was very spicy, though lacks "Ma" (the numbing effect). The Hunan lamb was well executed: tender thin slides of lamb, heavy on cumin as someone here mentioned (+1), and an appropriate amount of vegetables that enhanced the dish. I would return for the Sichuan lamb.
Order dishes to share as a group and you'll get an abundance of real food. Cards accepted, even AMEX.