I agree that this set is fairly unique. I've done all but four workouts now and parts of it might remind me of different workouts here and there, but overall it's definitely got its own unique feel.
As for how to acquire it more cheaply, it can be done -- with points and 10% off at totalfitnessdvds, plus the free shipping, I got it for $106. I actually felt bad for Mary on this one -- I don't know how she can be making money. At least my package arrived with discs intact, so no going back and forth/replacing. And, I certainly am a loyal and active customer for her.