My girlfriend had a flat tire by the McGill sports center, and this was the closest shop on Google maps. We walked there and they fixed it for her right on the spot for 12$ in just a few minutes. Anglophone friendly - which is not a given in the Plateau! They are not only good for fixing bike, but also for renting - they have electric bikes that look like little scooters with pedals :). I also heard good things from a friend who had a broken spoke on his bike wheel, got a replacement from them, and was very happy with their service.