As jumper from 60Hz to 144Hz, It's amazing. If you're serious about CS (or any other competitive game at that) don't even bother playing on anything lower than 144hz tbh. Reaction time was the biggest change for me, been hitting some shots that were almost impossible before. I am now getting frags regularly and feel like I am way more useful and lethal in matches. Ofc you will still be insta headshotted, but now I can insta headshot aswell. Definitely worth every Turkish Lira. Guaranteed I would be a much better player today if I had started my csgo journey with 144hz 3 years ago.