The Yoga Sanctuary is what made me practice on a more regular basis. I only take the Ashtanga classes there and the instructors are what make me come back again and again. You get a sense that the instructors care about you, and that whatever you do it will be done in a safe environment with no judgment. The people who attend the classes are friendly everyday people, and not yogis who are out there with something to prove.
The College studio is bright and airy. The classes are non-heated which is great because you can definitely work up a sweat. The receptionists are very friendly and very helpful.
I have been coming to this studio for years and I love it. If you have never practiced yoga before this is the place to start.