It's a little tough to rate a stadium without the bias of the event you were attending..but here goes:
Location: steps from union station. You can take the Go transit or TTC and easily access the ACC.
Drinks and Food: very overpriced. I paid around $13 for 1 drink.
Cleanliness: as good as good gets? I've never attended a dirty concert venue and the ACC hasn't broken the mould yet.
Note: Parking is very expensive during events.
Note: it can be a little difficult to find your seat if the event has already started at the lights are dim. They should put reflecting numbers to make it easy to see in the dark.
I've been here for more concerts than I can name, some of them including J Cole, Drake, Big Sean and so many more. All concerts were great. My most recent concert was tonight at Kendrick Lamars "Damn" tour. Great great great show!!