The best thing about YogaTree is the change rooms - I give them 5 stars on that. They have lockers that you can pre-program - a feature I've only seen in fancy spas. It makes it really convenient to store your valuables without worrying about them. They also have 4 showers, which can still get crowded, but it does make it possible to take a shower after hot yoga without waiting a long time. They also have a nice waiting area with couches and complimentary tea.
As for the class itself, I've only taken one so far and it was OK. Not the best but not the worse either, but I didn't see much to differentiate it from others I've been to. The studio was spacious and clean.
Overall, a decent yoga spot downtown, but I didn't find the classes particularly motivating.