As described by the previous speaker:
+ Extremely robust and stable design (see pictures)
+ Excelente haptics during installation (does not feel cheap at)
+ In the price range
Addendum:
+ The rails are made of about 1-1.5mm thick sheet are attached to the TV, which is painted black we are extremely stable.
Only negative was striking:
- Plugs and the associated screws look like cheapest flea market quality or China? Quality.
(In my case replaced by HILTI anchors and A2 stainless steel screws)
I have uploaded some images that say a little more than words. If necessary, I will provide detail like still images to, just let me know.
A "completely satisfied solution" for little money and great benefit.