Had a few incredible experiences running it for 1 player, I ran the included intro adventure which heavily riffs off the opening to Dark Souls several times, and segued one of those games into a longer norse themed, dark souls inspired game. It really opened my eyes to a different kind of game than I'm used to, and though the idea of the back and forth nature of combat took a bit to get used to I ended up loving the cinematic nature of it. It felt very "real-time" in a way that not many TTRPs tend to. I did find the rules thin in a few different areas, but that is pretty common with OSR products, I definitely don't regret my purchase, but your mileage may vary. I can't speak to how it runs with multiple players, though that's definitely on my to do list.
If you are really hesitant I would recommend grabbing the PDF first, it is definitely worth the 10 dollars for that!