I have exactly this arm. It does appear, bar badging, to be identical to the Ergotron arm, and it is superb. Solid as a rock and very easily, and smoothly, adjustable through a huge range of positions. Somebody mentioned minimum distance from the wall, I just measured and it goes back to about 13cm from the wall.
No worries. Hope it works out for you. (y)
Thanks for this bought one myself seems to be exactly what I was looking for
Amazing that an effective discount of £40 for a very good quality cantilever wall mount is so cold. I guess people really don't like the Ergotron quality.
better spend extra on Apple one.