I have not heard of the Hotel Omni hotel chain until we booked our hotel through Hotwire. Hotwire rated the hotel as a 4 star, for $120 a night, almost 50% off regular price, we decided to book it!
Hotel Omni's location is great, it is right across McGill's campus and walking distance to St Catherine, St Laurent and other major streets in the downtown Montreal core. The metro station is kitty-corner from the hotel. The location of the hotel made it easy to get around the city.
Parking - self-park was $16, the concierge directed us to their self-park lot. The directions may seem confusing but it is well worth not having to pay the extra $10 for valet. There are no in/out privileges with the self park.
Hotel - the hotel has a big of the dated appeal, but it is quite fancy. I really liked the wide open lobby area. There were quite a few people taking photos of the lobby when we arrived.
Room - our room was huge. With the king size bed, there was still room to have a dance party in the common/sitting area. We had a nice view of Mont Royal park facing Sherbrooke street. The bathroom was a descent size and it came with your very own heat lamp (to dry off after your shower)
Service - great, they were even able to give us a late check-out the next day without any issues.
Overall, I would come back to the hotel again. The downside is that they did not give us free WiFi. I will have to ask for it at the next Montreal visit.