I enjoyed 4 classes at Surfset Las Vegas while I was in town last week.
I tried: Blend, Burn, Balance, and Build.
I recommend the Burn class if you want a really intense workout. I broke a sweat within 5 minutes during this one. I think if a person did this class 3-4 times a week they would see fast results.
All in all, I thought the surf board added a fun new challenge to every move in each class because I had to use my core and other stabilizers to keep my balance.
The studio is large and clean, the instructors are friendly. I would have liked a few more pointers throughout, but I am a stickler for proper form.