I have never done yoga in my life, but was completely welcomed by the instructor and fellow students!
Because this first time, I have no idea whether or not it was good by comparison to other classes, but I had a very fun time. It was much more strenuous and soothing than I could even imagine and I felt it was a steal for $12.
That said, the yoga is free (suggested 10 dollar donation) and welcomes all levels of flexibility an experience. There is also a $2 rental fee for the yoga mat, but you can also bring your own.
If you live in and around Tempe, yoga and this place are worth a try. I hope to see you there soon!