I am 60+ years old and the other water exercise cd's I have get you moving, but it was time for me to get a real workout. The pictures and instruction for each move, which I laminated, was very helpful and I think the vocal cues are good.  I only had to refer to the pictures a couple times.  The workout itself is 30 minutes long, which for me is enough at this pace.  There is an additional 30 minutes of music alone that I use for more exercises or swimming.

Good for small group of AquaAerobics folks, but not large. The instructional ques were drowned out by the larger group splashing in the water. The complaint? They couldn't follow along.