I was looking for a solid mount for my amp (Vox AC15, 22 Kg). Since I sometimes perform on smaller stages I was looking for something that could place the amp at a certain height to be facing my head as much as possible. I must say I am happy with the confidence this amp stand gives me, I wanted some margin for weight (cfr competition with max 27kg versus the max 70kg of this product) and indeed, this stand does not budge when placing the Vox on it. Furthermore, regarding stability, the orange 'feet' have a relief that allows small corrections for uneven surfaces (millimeters, not centimeters difference ).
The unit can be taken apart, making it a little easier to transport.
Possible drawbacks: it is not possible to adjust the angle (but with a bit of foam underneath, it also works).
Also, the vertical supports can get in the way of inputs at the back of the amplifier. Easily solved by moving the amp slightly to the left/right but bad for my OCD :) The advantage of the longer vertical mounts is for 'open back' combos that they still have enough support.