Excellent heavy-duty monitor arm. I didn't think I was going to find a monitor arm that could hold my new Dell UltraSharp 43" 4K Monitor (spec weight 40lbs, so maybe 35lbs without stand). This arm holds it without any problem, and feels solid. The only negative would be the cable management, as it can only hold a couple cables - so you'll probably want to use black zip ties, twist ties, or Velcro to secure your cables to the arm, which is fine. Great monitor arm, I wouldn't hesitate to buy another one.

Great new primecables monitor arm model: I like almost everyone have gotten the basic Cab-LDT13-C012 model before. I ordered this arm after ordering a lg c3 from costco, but in the week i used the c3 before this monitor arm arrived i knew I couldn't use it as a pc monitor for various reasons. Nevertheless i used this new arm on my generic 27" monitor: Compared to the Cab-LDT13-C012: Pros: Build quality much higher, brush metal vs plastic, premium feel Much much larger clamping area, very stable base Much easier clamping mechanism, just turn Allen wrench above the table Much smoother lower arm rotation despite being much heavier Much smoother overall arm movement Attaching the monitor to the arm is way easier. Screw on a the provided plate to the monitor and you can just slide it onto the arm and secure with a thumb screw. Cons: With a relatively light monitor compared to what this monitor arm can theoretically carry, the tilt mechanism is at the edge of it's tolerance. To get the monitor face straight, or slightly downwards, I have to tighten the tilt mechanism to a point where it's barely adjustable. With a lighter monitor i would need tighten the tilt mechanism so tight that it may not be possible to adjust the tilt without loosening it again. I would assume a decently heavy monitor will have a more robust tilt adjustment. I would get this over the Cab-LDT13-C012 (assuming you get it on sale), unless you have a very light monitor. Especially if you plan on upgrading to a bigger/heavier monitor later.

I have a 49" monitor (Samsung CRG9) and this monitor arm is very stable. Love it!

Robust and worth the premium compared to their more budget monitor arm. Using it to hold a 32" monitor and the setup was very easy. Adjustments are relatively easy and the arm moves very smoothly. It is easy to turn and tilt the monitor and it does not cause any noticeable monitor wobble when typing on my desk.

Arm is great, the only small issue is that the cable organizing clip is flimsy and arrived broken, but other than that its great!

I needed a monitor mount for a massive Samsung Odyssey 57" and this was the best I could get for a decent price. Turns out it holds, it's very close but it holds up and still moves around.