I'd give 5/5 stars, but their vinyasa flow classes are almost all hot, so if you don't like hot, you're (I'm) out of luck most days. And if you show up to a class right after a heated class, be prepared for a heated room for a while. There is a beginner flow class a couple times per week that is very good, but heavily Ashtanga-based and traditional, not like a juicy flow class. But still excellent. And the Yin classes are amazing.
Instructors are knowledgeable, studio is clean and has great props and aromatherapy. Great music and atmosphere (except when Zumba is thumping next door!). Class sizes are never too big, and most instructors finish on time. Great location, fair prices, one of the best studios I've been to in Vegas. Highly recommend it.