I bought the K&M 19793 Tablet PC-Stativ for holding my Samsung Tab S7. The tripod is stable, i can quickly mount my tablet on the holder. The product seemed solid, but...
Unfortunately -one week after buying- a keyboard flightcase fell on it during transport to a rehearsal. It broke down one of the tablet holder legs. No repair was possible, so I had to buy the holder K&M 19790 again.
I advise buying an extra case for this holder, to protect the vulnerable parts.