The manga is ridiculously better than the anime cus the anime(just like berzerk) cut off at the lowest point in the series and ended with that.
Here are things that struck me as impressive:
Dinosaurs vs. Telepaths.
The score mode.
A giant tit monster vs. a sex freak.
Unstoppable monster vs. ping pong champion.
A romance that didn't involve bullshit.
A clone with the same memories.
People dying, people being brought back, and blood everywhere.
Some if not the most interesting monsters out there.
Me actually liking the main character the most.
A strong cast of characters, who have some actual emotions.
A plot on doomsday.