Warning, do not stay here. Staff has a bad attitude and blames you for things when they mess up. Kathleen is very rude, Vanessa is the only staff member I met that has good customer service.
Valet is terrible! Do not trust them with your car, Montreal has high vehicle theft rate and valet isn't always the way to go. The hotel is in the middle of tons of construction, I got woken up at 9:00am on a Saturday to the sounds of construction after being up until 3am dealing with valet issues. Also the church is near by which is beautiful but the bells go off every hour and they are very loud so sleep is not possible unless you are a very deep sleeper. I understand that's not the hotels fault but they should make the room more sound proof to drown out the sounds of the city.
I have stayed at the Lowes downtown many times and should have know better than to try something different. I highly recommend the Lowes, much better service, and location. The rooms at the Lowes are 10 times nicer and the bathrooms are a suite style versus the ones at the Marriott where you can't be in the bathroom unless the door is closed. Very disappointing stay and unfortunately the staff and management made no attempt to make my stay better or apologize for the valet issues. All that was said to me was its a desperate company. If your hotel is hiring that company to park your guests cars then unfortunately its your responsibility.