Very good. For an American take on a Japanese style of graphic novel it hits the mark pretty dead on. The story is intriguing (especially when you get to the back story after the manga) and the artwork is captivating. The only bad thing about the manga is that it seems to be difficult to find the subsequent books. A recommended read if you like manga and demon-westerns. Think along the lines of "Trigun".
A great demon shoot-em-up set in the old west with great characters. Couldn't put it down.