I felt a very big burn in my legs during the blasts, and I had to modify the blasts a bit. I got VERY winded during those blasts. I got through the whole video, but the choreography is more complex for the step combos than Imax 1 and 2, so I was not doing a good job of keeping my heart rate up during the step combos. Therefore, the lack of recovery time was not a huge deal today, but I think it will cause me an issue as I get the choreography down.
This is a very intense workout. I think it is harder than 1 and 2. I will not master it for a long time!