Aimed at instructors. I was reading the blurb for Blast, and it talks about what fitness gains "you (and your class participants) can expect."
These don't seem to be targetting home exercisers, as you can see from viewing the formats available for purchase: "blast fx v12.3 CD + online video". But I think you could still order them for home use. Why not? If you like instructors with great Australian accents and working out with a single individual against a plain white screen! (I was previewing the workout listed above, but they all seem to have this format.)
That's all I could glean and all I have to report!
Clare