There are cheaper models on the market but I bought this for use in a practice room and The boss model seemed to be the best suited for the job. Most important, the angle adjustment wheel is metal with metal teeth and not made of fragile plastic. It can support a wide range of amps up 21 kgs and the width is easily adjustable and the mechanism seems to be solid. It doesn’t fit every amp however, on the VOX AC15C1 the support bar falls exactly where you need to plug in the power lead! It can be remedied, although not very satisfactorily by chocking up the amp so that it sits 2cm higher on the bars underneath. Overall though this is a good solid adjustable amp stand. I have already noticed that guitarists don’t feel the need to crank up their amps so loud, as there is a better distribution of sound.
.....After some months now of use, I am very happy with the ampstand, the solution I have found in order to raise some amps a little to clear access to the electricity input socket on the back, is to get a pair of Foam door finger guards (to prevent children pinching their fingers), it works great and protects the amp too!