Platform is more cardio than a regular class, all done with this little platform/stool that's used for basically every exercise. The warm-up, class exercises, and wrap-up are all done using the platform. I'd recommend a towel, not just if you're a sweaty person, but there are ridges on the platform. My hands felt irritated because of the ridges, and we did a number of exercises on the ground, with our hands on the top of the platform.
Each exercise starts at normal speed, then pulses, then double-time. It's the double-time that gets your heart rate up, and creates the cardio. The issue, for me, was some of those exercises were tough enough at normal speed, let alone pulses. I was trying to figure out how in the world I was going to double-time it, and the exercise was almost over by the time my brain wrapped around what I needed to do. I felt like I lost a good chunk of time I could've used for strength training.
I honestly don't know if I'd do another platform class. I go to Pure Barre for the strength training aspect, and I like the exercises in a regular class because I can focus on form and the proper way to strength train, and not be rushed. When I'm not rushed, I can engage the muscle that I'm supposed to strength train. I feel like that's the number one reason I've gotten the results I have from Pure Barre. There's always some part of me that's sore the next day, and yoga feels so good. I wasn't sore, not one bit, after platform. Was I doing it right? I know I can sign up for another platform class if I want to, but I know that'll be very much in the future.