I have been taking classes at both Breathe locations - this weekend marked my first visit to the newly-opened McKenzie Towne location, and I think I prefer it to the Avenida location. It is more spacious - larger change-rooms, windows to let some light in, and they also have a non-heated studio.
I am still pretty new to yoga, so it's nice that they offer non-heated classes, including Beginner classes, so you can learn the basics before going to a heated class. The non-heated room is smaller, which allows for some more attention from the instructor. It's also nice to be in a class with other beginners, and not feel intimidated in a heated class with people pulling off headstands without even breaking a sweat!
I'm definitely going to make this my home location, and keep coming for non-heated classes!