I needed something to adjust the height & range of my monitors at work. This does the job, although as a taller (6'3") person, it's tough to get the mount to a height where my monitors are at eye level. Overall, good quality & well-made. Easy to assemble.
I have had the older Ergotron single monitor arms, but this one does not have a locking system to hold a monitor in place. It uses a spring-loaded mechanism to counter the weight of the monitors. Since I was using 2 Dell 2007FP's with 1600 x 1200 resolution - these are apparently too heavy for such a mechanism without a hard locking system, so beware. I managed to support the arms by using hose clamps over rubber tubing to solve the problem - unsightly, but it works!
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