I only owned a Razer HDK and Oculus Rift S before moving to the 8K DMAS headset. I can say, without a doubt, that this was the absolute best experience that I have had with a headset before.
First off, the display is amazing when cranked up to the max. What was once a mess of pixels in the distance on the Rift S is now a very clear image. If you have the hardware to run it, I can say that it makes a huge difference coming from a headset with a much small resolution.
The headphones were glitchy at first, but switching the headphones to 7.1 through Windows 10's sound settings fixed them. The amount of bass and clarity is highly unexpected when considering the design. I ran through many scenarios and can say that these somewhat rival some of my high-end headphones when tuned properly.
The software was pretty straight forward and made plenty of sense. It took a bit of tweaking to adjust the settings to get the best experience. Once the settings are set though, the experience is great.
A big thing I'm impressed about is the support team. The support and help that I have had has been amazing. The particular agent, Cream Lin, went above and beyond to make sure everything was good and helped answer questions very quickly. Usually support can be a headache for other products out there, but this is surprisingly one of the best support experiences I have ever had.