Everyone knows the Mandarin!
I've been to this location a number of times and I'm generally pretty happy. The food is generally very good and they re-stock any trays that are empty pretty quickly. See something empty? Go back in a few minutes and it should be there. They have a ton of employees always keeping watch of what needs to be re-stocked or cleaned and with the amount of people that are always here, it's highly appreciated. Only oddity is that once, my girlfriend noticed the bunch of crab legs she got was a slightly underdone, but the next batch she got was much better so she was happy.
The service is generally pretty good. The waiters and waitresses usually check up on you fairly often, mostly to check if you need a drink re-fill and they're usually really nice (I had one instance where they were ridiculously slow with bringing drinks and clearing old plates though). The owner / manager usually introduces themselves too. You'll want to make a reservation if you're going anywhere between 6 and 7pm on any given night, just so you aren't waiting. The take-out counter's pretty efficient in that you're in and out of there quickly. Parking's also very plentiful and you shouldn't have an issue as long as you aren't one of those people that 'must' park right in front.
My only minor gripe is the way they place the tables. Sometimes they place or move another person's table in a way that makes it a little hard for you to walk through the room, especially if you need to get around people who are seated. It's a problem with some rooms more than others. One weird fact is that they use those plastic fold out tables. They look pretty sturdy so I hope they monitor their condition.
All in all, you can't go wrong with the Mandarin at this location. I'm really not a fan of the Woodbine location because it's usually a lot busier with less parking. So go to this location if you have a choice.