There are two very different types of workouts.
S&H is good (though I prefer different lower body workouts), but not something that you can do as often as other workouts (Cathe recommends a shorter rotation when using the series).
SS/PP is often dissed by people as being "too easy," but the premixes expecially can take them to another level. I also think that the push/pull ör "circuït" arrangement of exercises (not really a "superset" in my book) makes the exercises feel easier, because you aren't totally exhausting one muscle group before moving on. You're distributing the effort a bit more, so it seems like you are putting in less effort.
I like the use of the stability ball in SS/PP, and they are fun workouts(S&H is fun to me because I like heavy, intense lifting, but some find the series to be too slow and hard to concentrate on).
YOu can turn either SS or PP into a "split routine" by using the premixes (upper body only-either 2 or 3 rounds--lower body only).