Yeah, I'm using an OLED monitor now (currently the AW2725Q - 4k 240hz) but previously used a 240hz Zowie TN monitor (XL2546) with Dyac for a few years (from late 2018 to around 2023).
I always loved it and remember being so happy when I got it considering it replaced my original BenQ (and first ever) 144hz monitor I bought in 2013.
Weirdly I also really liked the thick borders on the monitor (I know slimmer bezels are the 'thing' right now) but it was great for the games that I'd play at a pretty much locked 240fps and use Dyac (i.e. the backlight strobing). It basically was my dedicated FPS monitor, running it next to a 1440p 180hz regular IPS monitor for everything else. Some people seem to struggle with eye strain/headaches from using backlight strobing, I was always fine with it on the Zowie monitors and never used it on a different model/brand.
I kept the monitor all the way up until around 18 months or so ago when I then swapped to OLED (to the Alienware 360hz 1440p QD-OLED). I'd bought the XL2546 in November 2018 (basically did an entire new PC build for BFV and got a new monitor at the same time) and used it for that and COD/Warzone all throughout COVID then after I got a bit tired of COD and BF, swapped to using it for OW2 and The Finals after that released - and it was basically my main Finals display up until I got an OLED monitor. I briefly used it as a second screen but the viewing angles for it were awful unless I was looking straight at it and it started to really highlight how much nicer OLED panels were to look at (and how much more useful IPS monitors were as a second screen).
From what I've read, the newer TN models seem a lot better than the one I had in terms of image quality/colour accuracy/viewing angles etc. and Dyac 2 seems to be another nice improvement for backlight strobing. For me, I think now it's really only something you should consider if you want a monitor that is absolutely only for competitive titles.
If you want a monitor that you can do 'more' with then I'm not sure I'd be considering one anymore.