Its all you expect from a yoga class, plus some. I personally didn't expect to do so many push-ups or crunches in a yoga class...so he even makes yoga a bit more strength building than it already is!
As for equipment, bare feet and a yoga mat + yoga block is helpful. That being said, I will be using my gelpro mat from the kitchen next time around. The frog pose/stretch is a bear on my inner knee. Its not the actual stretch that hurts, its rather than hard contact with the floor, even if double/triple folding my mat!
I suppose I felt ok with the workout. The one person who shows you all the alternative positions...well, lets just say I only had to do maybe 5 of her alternatives. Now, I didn't say that I did them all well...but I did do them.
So, it was a worthwhile exercise....will continue to do this once a week until whenever I suppose!