Once it became clear that the pandemic was going to be around for a while, and I would be working from home for the foreseeable future, I decided I needed a better work setup than just plugging a monitor into my laptop. When looking for a dual monitor stand, I started by looking for one like I have at the office with independent spring-loaded arms. Then I found this one for less than half the price and decided to take a shot with it. I'm more or less glad I went with this one, though I do have a couple of minor gripes.
First of all, the set up couldn't be easier. I'm using the clamp on the back of my old desk temporarily until I get my new one that has a hole in it, where I will switch to the grommet clamp. It is very strong and stable. This is much heavier duty than I expected it to be. The mount is strong and solid, and even if I shake my wobbly desk the movement in the monitors is almost nil. My monitors at the office, with the much more expensive mounts, are way less stable-- even the motion of typing causes one of them to bounce a little bit-- and I have to readjust them pretty regularly, even with the tension on the springs adjusted as precisely as I can get them. With this set up, once you have them set, it takes some pretty significant effort to move them. Which is also a minor gripe if you ever have need to raise, lower, or rotate your monitors. You'll need an allen key to do it easily. I don't move my monitors very often, so it's not a big problem for me. But it's something to keep in mind.
Two other minor beefs: 1) The thumb screws that attach the backing plate to the monitor are too long for my monitors, and in order to get them tight enough, I had to use a flat washer and a locking washer (3rd picture). Not a huge deal, it was a couple of extra bucks at Lowe's, but it seems like that hardware should be included. 2) How close together you can get the monitors, especially smaller ones, is going to depend on how close to your face you want them, or how much clearance you have behind the desk. There's no lateral rotation at all in the arms, so the gap between the monitors is entirely reliant on horizontal adjustment, which either pushes the monitors forward, or pushes the arms back. I'm running dual 22" monitors, and I had to slide the desk about four inches from the wall to keep the monitors from being half way over the desk before the gap between them was mostly closed.
Those minor things aside, this is a really good stand. Especially for as inexpensive as it is. It's hard to not recommend this.