I took a Vinayasa Vigorous class here through my Passport to Prana class and I was very impressed. The studio, on the 3rd floor, is not at all hard to find and is near the queen st station as well as many parking spots.
My friend forgot her yoga mat and it was surprisingly not an extra charge. Almost all the other studios charge $2.50-3 per class for a rental. This class had approx. 8 students and the instructor was attentive as she moved around adjusting our poses & postures.
The studio was gorgeous with gigantic windows and hardwood flooring, extremely tranquil and immaculate.
I think the regular students are conspiring to keep this gem a secret!