I bought these stands for my HiFi speakers. Stability on the Millenium Desktop Monitor Mount DM1 is unmatched with other speaker stands in this price range. The manufacturing is high quality and sturdy, even bumping into the desk hard will not cause the speakers to shake or even fall, as long as everything is properly installed and tightened.
Visually, they look very discrete and they take up almost no space on a desk. The speaker itself is well isolated from the desk by these stands, no vibrations carry over. I was very surprised to find that out about these speaker stands, as the construction just looks like metal on metal, no visible isolation or damping, but there is little to no vibration on the desk.
One possible con would be the fact that you can not adjust the angle of the speakers, but the lack of that adjustment also contributes to the sturdiness and stability and low price of the product, so I am still giving this product the full five star rating as it does exactly what it is designed to do in the price range it is listed in.