I'm very happy with this rack. I've put my FP-10 piano on the bottom shelf, my laptop and Minilogue on the 2nd/middle (so I can use Flowkey for piano lessons without straining my neck) and use the top shelf for some effect pedals and, likely, in the near future, one of the synths on my Thomann wish list.
I'm also quite happy with Thomanns service: UPS somehow managed to deliver a heavily damaged box. The rack was still intact, but the package was missing a couple of screws, which Thomann delivered a couple of days after. It speaks for the quality of this rack that it survived an apparent car crash without any damage!
Thomann also allowed me to order the 650 mm top shelf, that wasn't available on the site.