I have been to Reuben's and Dunn's however for Montreal smoked meat, only cause I didn't feel like doing the trek to the Plateau (St Laurent) and the wait.
Reubens has been my favorite restaurant for over a decade. But this time around, instead of going to Chez Cora (on Drummond), i decided to have breakfast at Reubens and kept going back for my bacon n' eggs. The place was quiet (i hate crowded restaurants!!), i was allowed to sit where i wanted, service was very quick, the food was very good, and the price was right (under $7 plus tip). Plus, it was close to the hotels i stayed at. I usually go to Chez Cora, but it's kind of chaotic in there due to it being full of people all the time & it's also noisy. Don't know if i'll go back for that reason.
When i'd stay at the Hyatt Regency, i'd sometimes eat breakfast at the food court. A&W had a very good priced bacon n' eggs. Most people who know me are aware that i'm not the type to enjoy spending time in restaurants very much. I usually prefer eating on the run, or getting there, eat & make a quick exit. I find eating in restaurants such a blatant waste of time and money. The only time i do it is when i'm travelling, but i usually will fill up my bar fridge with vegetables and other types of food if my room is supplied with one. The Hyatt is a great place for this since there is an IGA supermarket within the building.