Short Review: They are great, adjust easily once you have them dialed in for the weight of your monitor, and are discreet. Long Review: Rationale: I got 2 of this stand (rather than a dual arm mount) because my desk space has a small cabinet and shelf space, thus it would not accommodate a dual arm. I have two Acer XB271HU monitors which come with large pointy red stands. The Acer stands themselves are great functionally speaking, but they are large and obtrusive in design. Installation: I mounted one arm using the clamp style and one using the grommet style. I didn't need to open any of the screw packages because my Acer monitors came with VESA screws preinstalled. All I had to do was remove the screws, put the VESA plate that comes with the arms in place, and screw them in. That's it for monitor prep. The clamp method was super easy to install. You just affix the clamp module to the base of the arm with the included screws. Clamp it where you think you want it and you are done. Please note: The base of the arm will not be centered to your monitor when the arm is in the closed position. You will probably have to move the base to the left/right depending on the way you orient the arm's elbow, in order to center your actual screen. See my attached picture for reference. The grommet method was just as easy, provided that you have a grommet hole already. I did not. I have a grommet drill bit and went to town on my desk. Measuring was tricky because as I stated earlier, the base will not be centered to your monitor. This means I had to attach the arm to the monitor and hold that whole thing up while my wife traced the outline of the base on the desk using a sharpie. (95% alcohol takes off all of the sharpie in case you are wondering) Once the base was traced. I measured where the hole should be and drilled away. A minute later I had a grommet hole and mounting was easy. They include a mounting plate with a long square headed bolt. The tightening dial threads smoothly and tightens the metal plate securely. Neither monitor wobbles. Function: The Acer XB271HU is a fairly heavy monitor. At first I was afraid the arm would not hold it as the monitor kept drooping even after turning the tension bolt. Well, keep turning it and don't be afraid. As long as your monitor is within the weight tolerance listed, you will be fine. My monitor height stays in place whether I lift it or lower it. The action in every direction is smooth and light/medium weight. You don't have to be strong to move the monitors, but they won't change position with the lightest of touch. The cable management routing is very nice. I haven't been able to use the upper most channel as my wiring is short and low to the monitor. I will be ordering longer cables so I can pull the monitors further up. The only two annoying parts of this arm are the tilt and rotation function. Tilt is managed by a bolt that must be tightened all the way once you have it where you want it. It does not allow for easy adjustment once its bolted in place. I tried to slightly loosen this bolt and the monitor would find its way tilting downward. I think this is a set it and forget it adjustment. Once you have it level to your liking, tighten it and never look back. Rotation action is super smooth after it is engaged. But there is a small bit of play/wiggle before it engages. So in order to get the rotation level set correctly, you have to compensate for the minor bit of play Conclusion: These monitor arms are sturdy and smooth. They look great, I don't see any of the arm/elbow from behind the monitor. As with most monitor arms, this will free up desk space in front of and under your monitors. I am thoroughly enjoying my current setup. I will update this review if anything should come up. As it stands, I highly recommend this arm.