I've been climbing here for a few years, since I moved to Montreal.
Having been to quite a few gyms in Montreal, the US and Toronto, I have to say that this gym is top notch and the best in Montreal. Every week there are new routes set up and the boulder areas are reset frequently. If they the higher walls are about 60ft high.
In summer, you can try climbing a few routes that they have on the outer walls of two huge silos. Those routes are 120ft high!