I'm not a hockey fan so this review is based entirely on my experience here for concerts and shows like the Cirque du Soleil. The seating is comfortable and even if you don't have the best seats you can still have a pretty good view of the stage. Sometimes if you're really lucky (as I was when I came for the Cirque) they might even upgrade you to significantly better seats just like that (we got upgraded from the nosebleeds to the floor). I'm pretty sure it's the kind of thing though that happens once in a blue moon so don't go expecting it and given how it's pretty full during hockey nights I imagine it never happens when the Habs play.
My main complaint is the price for food and drink. $11 for a Coors is absolutely ridiculous and overly expensive even by stadium food standards which is generally overpriced to begin with. Your best bet is to eat before you go.