If you know how to ride a bike...if you know how to walk...if you like to be around fun, cool people... Go to this place. Just go. I'm a geek about bike shops and this one has a great vibe - it's definitely "upscale" and pointed toward townie rides - if you're a hard core racer, you might not score much here, EXCEPT that the owner - Shea - is a very fit, fast rider and will talk training rides for as long as you like. I think this is ground zero for learning how/where to ride in Montreal.
I ran across this place when my wife, daughter and I were in town on a tourist gig and decided to do a tour through these guys. Had a great 5 hour experience with Catherine and Fian - learned the ins/outs of Montreal via bike and had a blast. Lots of other tours available and, as I write this, we're talking about which one to do next.