I used the same weights and step height as Ms. Cathe herself and did not find myself challenged.
When I previewed the video, I thought, "Hmmm, this doesn't look too bad," but having made that assumption before and then later regretting it when I actually did the video, I thought I'd match Cathe's weights and step height, just to be on the safe side.
I will definitely need to heavy up and raise the step height and see how it goes.
However, I always have trouble with any core work, tough ab work (especially planks and those oblique exercised where you have to balance on your tushy and bring your legs in and out), and big girl pushups, so I always know I am going to have to modify that portion of the workout.
Other than that, I thought is was a solid workout, with room to grow, but yes, I will have to do some adjusting myself to make it more challenging.
A long-winded answer to a short question! Apologies!
Susan G.