I've been going to Yoga One for years now - since before they changed studio locations. I love this place. The facilities are excellent, clean, and inviting. Pretty much every single staff member and instructor is competent and friendly. Although I have never taken part of the teacher training courses or their special yoga events and vacations, I've heard only fantastic things about them.
Most classes are a Baptiste vinyasa flow, which goes at a vigorous pace. The main practice room is very large with excellent circulation, no mirrors, no music.