I really like the weight workouts on this set (though the moves are not always in synch with the music, as Cathe slows down during sets, which bothers some people, but not me).
The cardio I have mixed feelings about.
I like the KB workout, even though it's a bit short and doesn't really reach the intensity I like without modification (like double-timing punches).
I've only done the bootcamp cardio once, and it didn't really call to me, but would appeal to those who like bootcamp cardio.
I did not like the step workouts at all. Rather torquey, and badly cued. (I did higher-intensity step once after a couple of previews, and got about 80% of the choreo, but on a few moves, I needed one more rep to really nail it, and it wasn't there. I did not even do lower-intensity step after preview.)
You could definitely mix and match from other workouts. Good chaptering and premixes make this very doable. Start with a 30-minute cardio premix (or just do a warm-up and a few sections of the rest of a workout, until you get to around 30 minutes), then tack on 1/2 or 3/4 of a weight workout split, like GS. (I think sometimes reps in some of the workouts are overkill, so they can definitely be shortened).
HTH!
