Very. I would recommend only playing it on controller. And it runs pretty well on Steam Deck. There's an fps unlocker/resolution fix that makes it play better, but not necessary.
A lot of people will say it's harder than other souls games, but it's really just different. The combat is amazing once you get the timing down. It can feel like a rhythm game at times when you're in the zone. And the feeling you get when you beat a difficult boss is second to none.
Still... Apparently not for everyone so