We spent six nights at the Intercontinental and had an enjoyable stay. The room was spacious, exceptionally quiet, had a safe, and a fridge (major plus!). Bathroom had both shower and separate tub (also spacious). For business travelers the hotel is close to the convention center and not far from subway (and bike) stations. The Wi-Fi was consistent (although only free in lobby for most) and the gym and pool (although small) were well suited for workouts. The hotel itself is in a good location - close to many restaurants, Old Montreal, Chinatown, downtown, etc and we found the concierge recommendations to be fairly good.
The only disadvantage is the parking - self-parking is $23/day and requires driving to the bottom of a garage and then using three elevators to get to your room. Don't drive if you don't have to when in Montreal - take advantage of the convenient public transportation system to explore Mile End, Mont-Royal Ave, Botanical Gardens, etc.