I think it's impossible to generalize about the effect of any isolation device, since the result is dependent on what it's sitting on to begin with and the particular vibration it's affected by in your environment. Not to mention personal taste. IMO, it's all trial and error.
While I was never a Vibrapod fan, I have had some luck using a Vibrapod "sandwich" under a CD player. You purchase a 18 x 14 piece of wood or Corian and place 8 Vibrapods around the perimeter, leaving the center unsupported. Then, just place your CD player on the shelf. Also works very well under some turntables and tube amps, so it might be worthwhile to invest, as you can try it under your various components.
While I was never a Vibrapod fan, I have had some luck using a Vibrapod "sandwich" under a CD player. You purchase a 18 x 14 piece of wood or Corian and place 8 Vibrapods around the perimeter, leaving the center unsupported. Then, just place your CD player on the shelf. Also works very well under some turntables and tube amps, so it might be worthwhile to invest, as you can try it under your various components.