I have done 20 or so classes at Calgary Hot. It's close to my house so a bit more convenient than Hot on 17th.
Pros:
-good instruction
-lots of parking
Cons:
-class content doesn't seem to change - if you like variety in your classes this may not be the place for you
-not the most beautiful studio you have never been in. The studio has no natural light
-seems like a weird schedule to me. Because the classes are longer than hot on 17th there are fewer classes (and possible time slots) to attend.
That said, I will still continue to go for the odd class but it won't be my home studio.