Flexible: Have tuned an older VESA 200x300 TV. But it is important that the bracket also fits when times got a new. And so this is the * only * mE that grows flexibly and continuously (!) To VESA 400x400.
Slim, mechanically, timeless designs and to * very * stable and comfortable to move. TV and fixed in all directions just hangs.
The included mounting material (plugs, screws) is also great.
A tiny flaw is the somewhat weak cable clips - but there is for 2.50 euros now unobtrusive velcro drum and is good.
For comparable quality from other manufacturers you would mE least 100, - Euro to spend more. Not here. Super product!