I did my own calibration, during which I encountered many issues to the point where I was considering returning it. When I fixed the colors, the whites would get messed up. When I fixed the whites, I had significantly reduced the brightness. My previous monitor was a very decent IPS 2K from 5-6 years ago and it seemed to lag behind, while next to it I also have a 4K OLED that I used as a reference point.

However, everything changed when I found the right settings, which were brightness at max and DisplayHDR set to HDR. Game mode off (removes many options but they are not useful), shadow control and contrast at 50 (untouched, that is). Personally, I have set it to strong local dimming.
From there, I made some small improvements through the Nvidia control panel.
Overall, it now has peak performance in games, it does not lag behind compared to an OLED panel and in some aspects, the colors can even 'pop' more than OLED. The dimming zones are not too many and on a black background, you will see a bright halo around white elements like the cursor. Also, during random browsing and especially in dark mode, there are some instabilities in how it manages brightness and I also had some strange flashes on YouTube that I never had with another monitor, which I fixed by changing the "browser angle backend".
Some classic VA weaknesses exist, but nothing you can't get used to.

Essentially, despite all the difficulties I had in the end, I have achieved more or less an OLED-like result in games at half the price of an OLED panel, with some limitations in other areas.

For its purchase value, it is an excellent model. When you buy it, pay attention to which version you are looking at. The Fast VA version is the one with Mini LED technology, which at 250 euros is unheard of. We are talking about 300+ lighting zones that eliminate the old side bleeding from side LED screens.

The screen for its price is 5 stars. However, I give it 4 so that you keep your expectations at the right level.

The two negatives are as follows:

- The stand of the screen is quite mediocre. Its long "legs" will require specific desks with enough space. I suggest making a small investment in a monitor arm. Personally, I have a desk 75cm wide so in my case it is just fine. However, for desks 50-60cm, look at it carefully to make sure you have enough space.

- 300+ lighting zones is something unique at this price, but even at 27 inches it is quite easy to see when the zones light up. If you have a black screen and move your mouse, you will see a series of 1*1cm zones lighting up and turning off as the mouse passes by.

All in all, it is a new technology that is coming at this price for the first time, so some compromises have been made to lower the cost. Beyond that, I highly recommend it and it will be one of the most impressive screens with excellent black and white contrast and realistic vibrant colors you have seen

Of course, it is difficult to find a 27-inch monitor in this price range that supports HDR and can be a good choice for the money.

You can overcome the annoying problem of OSD keys on the monitor to some extent with the I-Menu program that you can download from the website. Of course, if you can get the program to run properly after a few launches.

I used the calibrated color profiles that I downloaded from both "Pc Monitors" (Youtube review) and "RTings" websites and I was able to get better results with them, but I'm still experimenting.

I used a Paugge DP 2.1 cable to achieve the best (and future-proof) possible connection instead of the cables that come with the package, and now using the monitor @165 Hz. 10 Bit. I find it unnecessary to push the monitor to its limits and use the "overclocked" 180 Hz. refresh rate.

Even 120, 144 and 165 hz. also provides super-fluid game-play in games.

But, because of the bad viewing angles one should sit just in front of the monitor, for the best view, nowhere else... So it's not for crowded environments where you play games or watch movies with your friends.

But I can say that I find the "DCR" feature, which allows it to adjust its own brightness according to the intensity of work done in games and on the desktop, very useful.

In short, I can say that it would be a mistake to expect a monitor of this price to pull a rabbit out of a hat. Apart from the OSD keys and the annoying Variable Refresh Rate Flicker (VRR Flicker), it is a pretty good monitor; and deserves 4 out of 5 points.

(Update) Of course, it would be much better if there was a USB slot and an opportunity to update the device firmware from there, but unfortunately this is not available.

I will update my review as I explore more of the monitor.

*The review will be updated in the future*

This particular monitor has been on my radar for a long time. I was waiting for its price to drop to more reasonable levels (around $300 in the US), but it didn't, so I bought it for $400. It is important to clarify that this monitor is not for everyone who wants a 2K monitor, but exclusively for those who are looking for a truly HDR capable monitor without wanting to pay exorbitant prices for OLED and the problems that come with them.

Overall, positive impressions from the beginning. The stand is sturdy but requires a lot of space. The build quality could be better, but considering its MSRP, I have no complaints. It comes with 2 cables, 1 HDMI and 1 DP. I wouldn't use the HDMI as it limits the options for refresh rate and color depth (144Hz 8-bit or 60Hz 10-bit). The difference between 180Hz and 240Hz doesn't bother me at all. Maybe in some competitive FPS games, I could notice a difference, but I'm not interested in that particular genre.
The main selling point is clearly its contrast. By adjusting the local dimming to medium (at the maximum scale, the image quality clearly decreases), you get the best black results on a non-OLED panel. The monitor is HDR 1000 certified and truly outperforms all the "HDR 400" monitors I have tried in the past. The blooming around the cursor on a dark background is fully satisfactory. For my personal use, which includes HDR content, it seems to be an ideal choice in the first 10 days.
The colors are typical for a VA panel, although I tweaked the settings a bit. I didn't have any issues with having a red tint, as mentioned in forums. The same goes for ghosting. However, you do notice some black smearing, but with the ideal settings, it almost disappears.
For office work, there are definitely better panels with superior text clarity, and I wouldn't recommend it for that purpose.
One negative aspect I had read about was VRR flickering, and I can't disagree. It is easily noticeable and tiresome. I wouldn't use it under any circumstances.

As a rating, I give it 4.5 stars (at €400), although there is no such option here. The monitor delivers what it promises to a great extent. A smaller stand combined with no flickering in VRR would make it the perfect choice. And obviously, a better price!
If you want true black, look for GD-OLED monitors and be prepared to dig deep into your pocket. Unfortunately, it's not OLED.