Coming from the Seasonic prime ultra 1000watt, I can't say that I noticed any difference. It has a single, multi rail switch which I personally consider outdated since most high-end power supplies work on a single rail. However, it is generally very quiet in operation. The cables are at the edges and it is a bit difficult to pass them at an angle because of the capacitors, which may make cable management challenging for some. For those who want it, the company offers custom gen4 cables that connect directly to the power supply, of course, at an extra cost. If there is the possibility, I consider it a good purchase for a 1200W platinum power supply, as you can find it at a better price than many other companies with the same specifications, and the 10-year warranty I think will cover most needs.

EDIT:
The power supply is causing a shutdown on the computer with a kennel error code 41. The computer has been checked and I also have a Seasonic prime ultra 1000, and it doesn't give me such issues. It seems to have a problem, as it started failing after a week. Poor quality control

I bought it a few months ago, I was looking for something quality around 1000 watts but as the market is right now there aren't many options available...
I preferred to buy the 1200 which is much larger than what I actually need rather than something smaller or marginal.
Unless something unexpected happens, I will keep it for about 10 years, just like the previous one from another company that I replaced preemptively before it decided to leave on its own and take something else with it...

It is literally silent in any normal use I do on the PC since the fan never turns on.
Even when I managed to put it into operation with simultaneous stress tests on an overclocked CPU and GPU, it was silent... something that is unrealistic in everyday use.

The only negative thing I find about it is the relatively inflexible cables near the connectors due to the filtering capacitors they have, as well as the relatively long length (200mm) that makes it not fit in all cases.
However, the above negatives have a reason for being the way they are, as they provide better performance due to cleaner power and improved passive cooling when the fan is not working.

An open box was purchased for €150. I was torn between many power supplies from various brands (Seasonic, Corsair, Evga, Superflower, Enermax, and a couple more), and in the end, I chose this one mainly because of the offer. Normally, it was priced around €165, but I got it for €152 (I'm talking about the price at my doorstep). The reason I wanted such a good power supply is not because I have a monstrous system, at least not yet, but because the power in my area is really bad. Trying to adjust the graphics card and processor as I wanted, I realized that it's impossible to work properly with fluctuations of around +-100mV at any given moment. Monitoring the system, I saw the voltage "playing" when it definitely shouldn't. My system consists of an i5 4670k and an RX 570, which, due to the poor voltage, frequently turned off my screen. Yes, I know it's overkill, but I bought it because I liked it and for future systems.

The unboxing was quite impressive, and you can see it on YouTube. In my case, it was slightly less (open box), but nothing was missing inside, so no problem. It includes enough cables to power anything (even SLI/Crossfire, Threadripper, anything), and they are all of good quality. I only needed one "Sata" cable for 2 drives and a DVD drive, while with other power supplies, I would have needed 2 separate cables. For the motherboard, CPU, and GPU cables, you should keep in mind that they have capacitors at the end, which makes them quite rigid. If you don't care about cable management, you're okay, but if you're obsessed with appearance, you need to pay attention to it. Another thing I liked is that the cable length is good, and there are many ways to connect them to the power supply. Specifically, because I work with a huge case (Coolermaster Trooper), I always had an issue with the CPU cable; I had to use an extension to route it. This generally isn't the best solution if you want stable voltage because you're adding (questionable quality) length, and therefore resistance. With this power supply, it reached, although barely. I would have liked another 5-10 cm length in these "beasts," but few companies offer more than 650mm.

Regarding voltage, I immediately noticed a difference. I lowered the volts to levels that didn't work with the other power supplies I tried, and now it works. In-game, with one eye on the volts, I saw the graphics card much more stable where I set it. Of course, the VRM also plays a role, as well as other factors, but I saw a significant difference. Unfortunately, I don't have the appropriate equipment to thoroughly test all of this, but many reviewers do.

Beauty is subjective, but I can say that it's nicer than its photos. I installed it with the fan facing upwards, and it's perfect. Naturally, it's silent; I don't think the fan will ever work in my system. It only runs during startup until it enters Windows. It comes with a ten-year warranty. That's all from me; I hope I helped.

I have 2 so far that work continuously 24/7 since the beginning of February 2018 (and unfortunately I paid 225€ each at that time!).

Very high-quality construction, silent, with a large number of connections and options, very good performance in terms of temperature during operation, very good and comprehensive packaging and accessories.

What bothered me, based on a similar review by a well-known Greek on a foreign website, as well as based on technical specifications and my measurements, is that it cannot handle anything more than 1,050W - 1,100W AC input (approximately 950W consumption in DC). During this power range, a characteristic "click" sound is heard and the OPP or OCP relay trips, requiring you to turn it off from the switch for a few seconds and then turn it back on to recover. Tested in both single rail mode (which allows maximum current/maximum power on any rail) and multi rail mode with no difference. Measured with a reliable Energy Cost Meter directly from the wall socket.

Other than that, if it doesn't need to operate at its limits at times (there must be a consumption lower than 950W DC, always), I consider it a very high-quality power supply from the top brand Corsair, with the 10-year warranty exuding a sense of trust for the owner.