Just got back from the gym where I did this workout With Kelly Anne DeCollibus. It was a fun workout (not for her!) and she looks great! She's a real trooper in the gym and has the 'never say die' attitude, and I know some guys who would not survive this workout at the pace and loads used.
I do this exact program when the mood hits, and yes, use higher loads, but it floors me every time. This gal never fails to impress me with her strength and willingness to give it her all what ever gets thrown at her, and she's drop dead pretty (in this mans opinion, your mileage may vary...) which only adds to the enjoyment of training such a person.