I wanted to have my synths above each other, but I was a bit thrown off by the prices of these kind of stands. This one was the cheapest option I could find.
I find it very easily to setup, it also fits on stands of other brands, but make sure you check the diameter of the tubes before you try that.
The one problem I have with it is that the bars are very long, which is good for large keyboards I guess, but a large part of it hangs over your keyboard underneath, which becomes partly inaccessible, which for a knob-turning synthesist as myself can become irritating. My top keyboard however is the small yamaha reface CS, so I just keep it as far back as I can and then it's fine, but if you want to use this for large keyboards, be aware that you might not be able to reach all the knobs of your lower keyboard.
All in all it is a cheap, sturdy stand which I find to be great value for the money.