Having not a huge area for use of a studio, I bought one of these to get as much racked as possible but also keeping it fairly 'mobile'.
I use this with a Yamaha MG166 mixer and separate 1U headphone amp fitted to the top tiltable section and underneath a very heavy power amp, tray and rack power supply.
It is very solidly built, nice smooth and lockable wheels to move it around on.
For a small studio, this is great and I succeeded in getting a majority if not all of the mess of cables off the floor or trailing between units and now all self contained on this rack stand. Due to it being not an enclosed frame, it still allows you to swivel round and change the cables with ease.
In a way I prefer this frame to the other designs where the lower rack is front mounted, as this rack allows me to sit in front of the tilted mixer, with the lower units set back far enough not to bash your knees against.
Just 2 star lost in quality as not all of the rack hole threads are as clean and well cut as they could have been, but overall very nice rack stand.