Hercules Stands KS400B

Easy to adjust.

Not that well assembled, there is some wobbling and when moved around one can get the impression that the whole thing would fall apart.
Used when sitting is relatively OK, standing it moves too much.

Packs down small.

It looks high quality, but the keyboard support arms are shaky. The rubber pads on top seem to stick to the keyboard bottom and reduce the shaking freedom, but I also prefer using the stand turned with its back side forward so that the keys are closer to the hinges / joints - and I use the lowest position. This way the motion is practically eliminated, but I can imagine that anyone who sets the stand higher or needs the correct direction (e.g., to use the additional second level arms) will have headaches with stability.

I use it for my lighting console which is in a flightcase.
The weight of the entire flightcase is 28 kg.
All is very stable, even when I am toggling hard on my console.

The only little remark I have is there is no locking mechanism to keep the legs together/closed when it is folded. So to cary the stand and keep it folded I use a strap.

Easy folding!!
Light Weight !!
Solid!
Sooooooo goooooood

For Yamaha S90 tested other stand, but was not sturdy. This one is very good for heavy keyboards.

The stand feels a little flimsy when you move it side to side with nothing standing on it, but under the weight it's as strong as a tank.