After three years of usage here is my review:
TLDR: great stand, 10/10 experience.
A great stand for heavy keyboards. I am using it with 30kg Kawai VPC1, and the stand does great job. It is possible to regulate it on the uneven surface, the build quality is good. Keyboard does not on top of it.
Easy to place, easy to pick up.
The only problem I had is that, due to usage, in a year or two one of the rubber lines on the top of stand started to fall off – I think it is something to expect, as the rubbers are easily replacable and are a replacable material on any stand in any case.