Anime News Networks Carlo Santos says 7 Billion Needles manga is a "modern polish and hard-hitting action" piece, while Deb Aoki mentions that it has basically the same plot as Parasyte.
7 Billion Needles (Japanese: 70, Hepburn: 70 Oku no Hari) is a Japanese manga series written and illustrated by Nobuaki Tadano and published in North America by Vertical. Writing for Anime News Network, Carlo Santos described the manga as a "modern polish and hard-hitting action". Deb Aoki from About.com said that "7 Billion Needles is a solid and entertaining sci-fi/action read that's well worth a look", and praised the "crisp and straightforward graphic storytelling", but criticized the "unimaginative character designs" saying, "do all Japanese schoolgirls look like siblings, just with different hairstyles?". Aoki also noted that the plot is basically the same as Parasyte. 
