Wynn Fitness was my gym when I was working in Toronto. I was lucky enough to get a Groupon for two months for $31 with $75 in Wynn-Bucks. I also tried GoodLife Fitness on Yonge/Dundas and 99 Sudbury in Liberty Village and Wynn was by far my favourite. It wasn't the biggest gym (it only has one studio room at the 2nd floor) but seemed to have the least traffic. I'd usually go to Wynn after 7PM on weekdays and at noon on weekdays and I never had to wait for a machine. The gym is clean and the equipment all seems to be new (you won't find hardly any "Out of Order" signs here!).
A huge plus is how friendly the staff is! From day one the staff was eager to help and show me around. Even though they knew I'd only be a member for a couple months they treated me like a longtime member. Also, the location is a HUGE plus being that is only a minute walk from St Lawrence Market!
Two things that could be improved about Wynn are the lack of squat racks and the free weights organization. From what I can remember, Wynn only had 2-3 squat racks. Also the free weights are quite disorganized since the racks don't have the weight size labeled on them so people stack them wherever. Other than that, I'd definitely come back here if I'm around. And I appreciate all the great promos that Wynn still emails me!