We kind of stumbled upon this place, and glad that we did. We had actually had reservations at a different steak house. What initially drew us in was ambiance and that the prices were more reasonable compared to other restaurants in Old Montreal.
We started out at the bar, then made our way to the restaurant. They are all the usual cuts that you would normally see at a good steak house. They specialty however is the prime rib. I went with the prime rib and my wife went with the top sirloin. Each dish came with a side and I had their twice baked potato which was equally excellent.
Service was over the top. We had initially ordered a bottle of wine which was terrible. We each had a glass and my wife may a comment that we had buyers remorse. Bella, who was taking care of us, said no problem and got us a replacement. We didn't expect that, and she came through with a much better wine.
I would highly recommend Keg if you in Montreal and looking for a good steak and a great experience.