These are a bit expensive given that they are just made out of plastic and rubber pieces however I noticed an immediate improvement after installing these mostly in the stereo separation but it also improved over-all clarity too

Some of the materials look a bit cheap out of the box, but once you put it all together it has a solidly built feel

Yea, my monitors wobble a little bit with the table, but it gives a little bit of extra height to make them just right at my ear lvl, and it sounds awsome

These did reduce the perceived bass response of my speakers a bit but that is probably because before installing these, the sound of my desktop speakers was actually a bit muddy, rather than accurate

so it would rattle a little bit.

Even though I have nice speakers (B&W 686), I was never completely happy with their sound unless I was standing in line with the tweeter