Ask any anime fan today what the best current anime is, and you'll hear, "Full Metal Alchemist, and Ghost In the Shell: Stand Alone Complex." I've never heard such a unanimous answer in all of anime history. Everyone agrees these are the two best current anime. This tells me that not enough people have been watching `Gantz' otherwise it'd be on their list.
The plot: I'm not sure a description of the plot will really persuade you to buy `Gantz' but here it is. A perverted teenage boy is killed and finds himself along with other recently deceased being forced by a machine Gantz to assassinate aliens living in Tokyo's slums.
It's not so much the plot of `Gantz' but its characters that make it work. Our hero is a high school nerd; he's worried more about bullies and having enough money for porn than he is about aliens. His goal is sex, not protection of the human race. As you might guess this leads to laugh out loud scenes.
Yes `Gantz' has TONS of sex, violence, and profanity, but it really does have context. We care very deeply for our hero, even if his biggest adventure of the day is buying porn.
I can't really compare `Gantz' to any other anime except in terms of production quality. THE BEST I'VE EVER SEEN! And yes I've seen them all, yes even better than `Last Exile' or `Ghost In the Shell' or `Night Shift Nurses'.
The only reason I can think of as to why so few of my fellow anime fans on Amazon are giving `Gantz' a low rating is that they've never seen or just don't care for R rated or boarder line X-rated anime like `Gantz'.
NEWCOMERS NOTE: Volume 1 is not the best volume to start `Gantz' because as with all stories there's an introduction. Start with volume 3, you can catch up and trust me! After the first five minutes of volume 3, you'll be ordering every volume of `Gantz' there is.