The Marriott in downtown Calgary is a good hotel, but not quite as upscale as some of it's neighbors. All the same, the rooms are clean, the beds comfortable, and the service acceptable. The location in downtown is close to Stephen Ave, the train, the needle-thing, and is within reasonable walking distance to several downtown towers.
The Starbuck's downstairs is a nice perk, and the other restaurants (and room service) serve good food.
The workout facility has very nice, clean, and modern equipment. A weird layout, but plenty of space all the same.
The hotel could probably use a bit of an update, but that's mainly me just being picky. All in all, a nice hotel that I would happily stay in again.