I can confirm the following:
The build quality is bad because all the screws on the boom are sharp-edged. The seams were apparently in "a hurry" together-gefrickelt and the seam end dangling in front of him. Also Lagerspuren (abrasions, etc.) are visible.
The equally been criticized crossbar interferes badly when lying, which should be cast by Aufliegepolster contrary.
Conclusion:
For the price "ok" - again I would, however, they do not buy, but spend more from your local supplier a few euros more.