I happened to be in Montreal during a weekend in late August for a bachelor party and had booked this Quality Hotel for the occasion. I did not fair nearly as well as past reviewers though. I ended up paying about $160 per room through Expedia.
Check in was a breeze and the front desk clerk was friendly and efficient. She was also able to suggest a nearby parking garage (as they were rented out) and restaurants in the area. Unfortunately our rooms were on separate floor and one was on an "upgraded" floor but we could not see much of a difference save a few different pieces of furniture in the hallway and rooms.
The room itself was kept fairly clean except for a decent size stain on the carpet. The room had a flat screen TV with a fair selection of English and French channels. Also present in the room is a coffee maker. The cabinet/dresser has a door to accommodate a mini fridge but alas no fridge. We were out most of the night and did not return until about 5:00 am at which time it was quiet so I can't comment on the noise isolation. The beds were OK, a bit stiff. One complaint I have is that we had the air conditioner jacked up to full and it was still pretty sticky. Free WiFi was a nice plus.
The location of the hotel is what makes this place. Being downtown, pretty much everything is walkable which was a big plus for us.
Overall, I'd say we were paying for the location more than anything. The hotel itself and amenities were par or sub-par in most cases.