If you're considering these ISO-Pads, you've most likely had some experience with a pair of monitors at some point (or at least are thinking about buying your own). These pads sort of killed two birds with one stone for me since I had purchased some decent monitors and wanted to protect them for the metal surface of my monitor stands as well as isolate them to prevent unwanted noise.
There is a vocal group of people that say that this sort of isolation is just rubbish or simply not enough, but I'd beg to differ. Noticeably less vibration gets transfered downward into my stands, thus preventing any noise from moving parts that could potentially influence my impression of my mix. If true and pure sound is important to you, then you should definitely invest in acoustic isolation of some kind.
This is one solution. They're handy to have around and can be moved on short notice if need be. The angles that you can achieve with them are more than sufficient for a home studio.
All in all, it's just a convenient product to have on hand for the budding producer or musician with a taste for good audio quality.