It's fun, the walls are challenging and the routes are constantly changing so that eventually a novice climber would be able to to try the same slopey angles as a more experienced climber had last week. At this gym, climbers are attached to the belayer, not to the floor as with some other climbing gyms. Bouldering is plentiful as well.
It's conveniently located close to the Gardiner so it's a breeze to drive there when it's not rush hour and there's lots of parking around. For public transit takers, the trek is pretty straightforward east-west on the King Street car (get off at the Joe Shuster Way stop, it's closer than walking in from Dufferin).