I have both and use them regularly. You can't beat the price of $15 each and both sets include 3 DVD's with a total of 12 workouts plus a bonus. Since each workout is only 10-15 minutes of high intensity moves with no break, I either use them as an add-on finisher or string 2-3 together as one workout. The cardio series has no music though is you are particluar about that, then the strength series has some background music but nothing special. These are definitely advanced and I think you would get alot of use out of them.