If only everything was as well made as this! I bought two... for a 27" iMac, and a 24" NTC monitor.
This is robust quality design. You get what you pay for, and these mounts do what they are meant to at a decent price - elegantly and effortlessly.
They give the reassuring feeling that your equipment is in safe hands... that these products are actually built to last.
In all it takes maybe 20 minutes to assemble these and mount your computer / monitor ...including the few minutes to adjust the tension correctly as described in the brief install guides.
Of course with the heaviest items you should expect some reasonable resistance in the lowest weight-bearing joint of the desk mount when or if you have to swivel your gear through 180 degrees, which is what I think the reviewer below is referring to.
But at the 13.5kg max weight for this product, extended upon a single point of attachment to the desk, the law of gravity makes itself known! You just need to hold the Ergotrons second level section when moving it as well as the computer/monitor to facilitate easy manipulation.
A 27" iMac weighs 13.5kg ... and it floats on these things: up, down, in landscape or portrait orientation, or even facing the ceiling or floor...whatever you like. But remember - as advertised - the maximum HEIGHT adjustment up or down is 5"
There's a serious guarantee on them, and the UK distributor shipped them to me next day as a courtesy and at no cost.
What's not to like?