I bought this stand for my SP5600 when I finally had the space for it.
To begin, aesthetically it's way better than the X shaped stand I used before this.
On personal note, this stand solved the biggest issue I had with my SP5600 keyboard. Unfortunately I wasn't able to do endless notes/sustain on the keyboard. As soon as I raised my hands (foot on sustain pedal) the notes would just always fade away slowly. (I do not exclude the possibility that this was actually possible, but I never found that option)
However, This stand solved that problem for me and that was a massive plus for me.
As other people states as well, transportation can be a thingy. I decided not to use the screws, so I can take the keyboard easily of the stand and move it to my working desk in the next room. that method has worked well for me.
I'm really happy I added this to my keyboard!