It easily supports a Samsung Odyssey 49-inch and is a very sturdy and well-made construction. I recommend it for ultra-wide screens without hesitation

I mounted a Philips Envia 49'' monitor on it. The monitor weighs about 10 kg, the arm holds it securely, it is all made of iron and looks very sturdy. Overall, very nice and it clears your desk from unnecessary items. The only thing that might seem bad to some is that the minimum height of the base is about 12 centimeters.

How much can someone write about a stand, and yet I ended up writing quite a bit:

I installed a DELL U4025QW (40", Curved, Superwide 21:9, 8.35kg) on the stand.
I am VERY satisfied on all levels. Let me point out some things that someone might not find or see at first glance:
1) This particular monitor's weight is handled very easily. With the two adjustments you need to dial in for your monitor's weight, you can very easily find the sweet spot and the monitor stays stable BUT mainly, thanks to the very good and well-thought-out construction of the stand, changing the monitor's position (forward-backward, up-down, tilt) is very easy and doesn't require much force.
2) VERY important, something that annoyed me with my previous stand, is the pivot adjustment, i.e., being able to turn the monitor to portrait. I don't know how many people need this, but even those who do probably want to set the monitor one way or another and have it stay there. It's annoying that, due to this feature, with some stands, whenever you adjust the monitor's height, tilt, etc., you have to fix it every time to make it horizontal. I can't imagine anyone wanting to work on a monitor that's tilted 1-2-5 degrees to the right or left. This particular stand has a screw at the back that lets you tighten it so you can lock the monitor horizontally and it never tilts. Very simple but annoying in stands that don't have this.
3) The mechanism right behind the plate that screws onto the monitor has an adjustment for how much resistance it gives to the monitor (depending on its weight) so the monitor doesn't fall down. In simple stands, at this point, there's a simple screw that you tighten a lot so that static friction keeps the monitor from tilting due to its weight, but when you need to change the angle, you have to use a lot of force. The mechanism in this stand works very nicely and cleverly. When you want to raise the monitor (e.g., if you sit further forward or higher and want to tilt it up), it offers no resistance and you can do it very easily. The mechanism only offers resistance when moving downward, but just enough so that to tilt it down you just need to use a bit more force than the monitor's weight already applies. Amazing system.
That's about it, you'll find the rest yourselves.
I was thinking of spending 250-350 euros for the well-known brand that many people buy and is considered the best, but I decided to try the stand reviewed here first because the specs looked okay and the price was VERY fair. I'm sure if someone spends 300-350 they'll get something better in terms of quality and features. But this particular stand is so good that personally I DON'T miss anything I wanted to do.
That's all, to maybe help someone who finds themselves in the same situation, with a large monitor and looking for a solution.

Edit 14/01/2026: After a week I finally managed to do cable management. For 2 cables it's not even worth mentioning, but even for the 6 I have running (Thunderbolt 4/USB-C + HDMI + Power Cable + USB-C + USB-A), it's OK

I installed a 34 ultrawide monitor.
It seems to be quite a sturdy construction and it is very easy to move the arm in any direction you want, although for up and down it requires a bit more force.
I would highly recommend it.

"I installed a 34'' monitor and it supports it very comfortably. You can rotate it around the desk 360 degrees, with the center of gravity always being the inside of the desk. Easy installation with instructions. All the materials are in different bags with names according to the instructions. The cable management is OK for 3-4 cables, not more."