After reading the Hotwire reviews (which I should have done in the first place) I was able to make more educated guesses. The reviews of the 3 Star mention a proximity to Chinatown and Old Montreal, so it is almost certainly the Holiday Inn Select. The reviews of the 4 Star mention a proximity to Crescent & St. Catherine, so I felt confident it was either the Sheraton Center or the Omni (the Intercontinental seemed too far away from those two streets). I decided to go ahead and book using the Betterbidding HOTWIRE link, and it was indeed the Sheraton Center. Having never stayed there before, my main concern is the availability of parking. I seem to recall reading that there is a lot behind the hotel, but it would be nice if the hotel websites addressed parking in their descriptions.