I've read webtoon "All of us are dead (Now at our school)" right after watching the trailer of this show. It wasn't a lengthy comic with a heavy conversation, so it was easy to turn to the next chapters. I'm not a fan of the style of the comic, but it was still fun and intense. I'm in the 5th episode right now, and so far I've felt the show adapted the original webtoon quiet well which is why I wanted to write a review about it. However, I get to see these assumptions of promoting High school of the dead from the comments which is not okay seriously. I also watched High school of the Dead long time ago. All I can remember is that the anime was more about female body images rather than zombies and stuff. Plots and characters in both shows, there's no any similarity between the two. The only similar aspect is they both use high school students as main characters. Honestly, Is there anime that doesn't use high school students as main characters? Seriously, google High school of the dead anime, and watch it on youtube, you'll get the idea within 2 minutes. I would not recommend to watch it with female companions or friends though. Back to the show, All of us are dead, it's well made, and it adopted the original story very well.
Update: I ended up watching the whole series for 2 days. It's worth it just as other positive reviewers say. It's well paced, and mixed with good actions. Also it created a different type of zombie.