I really like both the original step-boxing workout and her new one, with a slight preference for the new one because it's all cardio and longer. The two workouts do have enough different choreography to feel different. The new workout is supposed to be a bit slower, but it's not perceptibly so, which is a good thing, IMO, because I like her pace.
I also really like her new cardio-sculpt and "NYC". (I'm doing a KC-M rotation, using all her workouts, but haven't gotten to "Shape of Things to Come" yet--it's on the plans for today--so can't speak to that one yet). I think the new one is the best of her cardio/sculpt type workouts.
I'm lukewarm on her step workout. I like Kelly a lot, but her cuing is iffy and sometimes frustrating (though her moves are simple). Sometimes how she cues a move doesn't jog my memory enough, and at times, she'll say to 'repeat that, other side' without specifying what 'that' is: the last move? the last sequence? from the top of this segment? (but quite a few instructors do that).