Saw it in IMAX with fewer than 10 other people in the theater. My wife is the fan, I just watched along at home when I had the chance. I watch a lot of anime too but I don’t consider Demon Slayer super amazing or anything. The movie was good. If you’re gonna see an anime on a big screen, might as well go for the one with impressive visuals. $9 for a matinee screening in IMAX is pretty good value.