[About the TV wall bracket]
I used to hang in my iMac 27 "(2011) to my office wall (plasterboard). 8 Moly and voila! It takes 2 to place pins on the wall, but honestly, if you take your time and we are meticulous like me, it takes a good fifteen minutes to install. The magnetic level is a little more enjoyable.
The support base is wide enough to prevent the shearing effect on the plasterboard. Be careful though: for a screen of more than 15kgs, I do not like it would fix the bracket on plasterboard (there are other solutions).
The 2 parts intended to attach the screen in less than two and all the stars on the wall without wobbling off iMac ... it is seated against the wall (about 8cm from the wall), and when I turn it on, I pull the to me until I have my comfort position. The arm remains straight, even more than 40cm from the wall.
Nothing creaks, but it takes a little force on the arm to each movement (at the same time it is a sign that it is strong also ^^).
My iMac weighing less than 10kgs, no risk of it ends up on the floor one day.
[Verdict]
VESA 50 to 400, strong and sturdy, well made, easy to assemble ... TecTake exudes quality and I highly recommend this brand!
Note that the screws to secure the two bars on the screen are not provided (as they are in other models of the brand).