After I read a lot of positive reviews in some forums I bought myself a Deeflexx (for 349Euro incl. tax) - for my Koch Studiotone (my live amp).
This one:
Deeflexx
Does it work?
Yes, it works fine in my studio - ok in our rehearsal room - I prefer my old amp stand
It would be fine for 30Euros - but not for 10 times the money.
This one works fine:
My amp stand