I'm not typically one to criticize a work for being too gory. Grotesque imagery is typically fine by me, as long as there's some substance to go along with it. The problem with Ultra Gash Inferno is that it has almost no substance, with it's stories having very little point to them at all, most of them simply trading on shock value alone. The characters in them also aren't very memorable.
The only good story out of the nine of them was also the longest; the final tale, titled "Nonresistance City". It didn't exactly explore any interesting themes or ideas, but it at least had a
cohesive tale which was just messed up enough to be mildly interesting. Even so, without any thematic elements or character development, the story still feels kind of pointless and empty by the end of it, despite it being the standout tale of the book.
The art throughout the book was extremely detailed and very well drawn, with plenty of interesting as well as experimental panel compositions.
However, the high quality of the art can't save the pointlessness of the stories, and the whole thing ends up feeling like just a bunch of cheap schlock made for a very specific audience. I can truly only recommend this to people who enjoy guro for guro's sake.