Not sure what the othher reviews are talking about with the “no height-adjustability” thing, It does have height adjustability, and the clamp isn't the wrong way round either, you can make it face any direction. This is a good monitor arm, especially for the price. Only reason I'm not rating 5 stars is because the monitor bracket has lost it's stiffness after about 5–6 months of use, so the monitor always faces down, if you lift it up it slides back down after a minute. This probably isn't due to the quality of the arm, however, as I have a massive 32in ultrawide monitor attached to the poor thing. I think it's above the weight limit, or the width of the monitor creates more torque on the arm.
Im summary, great arm, does everything I need it to, just don't buy it if you have a very wide or very heavy monitor.