We stumbled across this place while looking for a restaurant with live music in old city. A quick check with the hotel's concierge resulted in more personal recommendation.
It was very easy to find and we didn't regret it at all. The service was delightful and very professional. The food was very satisfying with decent sized portions and very nice setting. They claim they have the best french onion soup in all of Montreal - not sure if that's exactly true, but that was definitely on par with the best one we tried before.
Restaurant is very trendy decorated and is very intimate and cozy. Music itself somewhat disappointed - musician didn't sound exactly professional - but they have different musicians each day - you might get more lucky. Nevertheless, we didn't regret it a bit.
Make sure you get a reservation in advance - they do get booked.
They are on more expensive side than most other places around. Still, relatively inexpensive by US standards.