Shortly after moving to Brampton, this was the first buffet place my in-laws took me to. I've been back several times since, with good reason.
The only issue I have is that the Mandarin is so good that there's often a wait to get in if you haven't made a reservation.
Once you're inside, you get a huge selection of food, with a good mix of Chinese and western food (their prime rib and Yorkshire puddings are quite good). There's a great balance between spicy foods, and other food that won't leave my wife grumbling about the heat. A word to the wise - although the spicy chicken is not particular spicy in and of itself, there are some small red peppers included that pack a pretty potent kick.
The staff are very friendly, polite, and helpful.
All in all, a great experience, and one I look forward to repeating in the future.