Fitness Videos - Anyone ever tried Aerobox by Kathy Smith?

It is a VHS tape that is about 10 years old. I used to do this one and it was the hardest workout I have ever done. I used to do it when I was like 140lbs and under. I am thinking of dusting it off and giving it a try. I am wondering if anyone else has done this and what do you think about it?

Hey Rozy, back in the day, I never did this video your speaking of, but I love Kathy Smith and have done 3 of her other videos. I hope it's working for you.