I went here today to try get some work done and find a new awesome cafe. I arrived at 6:00 and the place looked nice and there were a few customers in there with pleasant glows...turns out that was a sheen of sweat. I went to order and the two workers behind the counter were soaked and literally dripping with sweat. Yikes. Certainly not surprising considering that it was much hotter inside than outside in the summer air.
Before making my purchase I had the sense to ask when they close because Toronto has this disease of closing early. Sure enough, they were closing at 7:00pm. There are other places along the street that are cooler and open later. So, on account of the uncomfortable environment and restrictive hours they are not a visitable cafe.
I'll probably visit again when the weather cools off and try their coffee and maybe a bit of food, but unless it's really great today's experience of Quaff definitely merits the "meh, I've experienced better" rating.