A friend booked the tour so I had no idea what I was getting into besides I would be riding a bike. Turned out to be one of the coolest things I did in Montreal. We had a large group so there were two guides that led us. Shea (the owner) and Martin. They were super knowledgeable of the area and the history and overall awesome people.
You start out in their shop where they have a bunch of bikes and helmets. They'll adjust the seats as necessary. I thought it was cool that all the bikes had names. I had Percival. After getting everything ready and some quick instructions you'll head out on your 18km bike ride. You'll stop frequently for the guides to give you some info on the area.
I haven't ridden a bike in a LONG time. so for a bike novice, the whole bike tour was like a 6.5/10 difficulty. Most of it is okay, but there was one long hill that took it's toll on my legs.
I would recommend anyone going to Montreal to try this, if the weather is nice. You get to see the city in a fairly relaxed manner and probably get to spots that you would never think of if you were driving a car.