Even though I have read all the chapters (newest chapter currently is 42) so far, I will review the first 13 ones. Those chapters are the most enjoyable, later chapters leave impression that the creators are experimenting rather than sticking with the starting formula.

Story: The manga revolves around a concept - protagonists get involved into Dead Tube, a website (similar to YouTube) where you participate to win a lot of money if you get the most views, but you will suffer harsh punishment if your videos get the lowest views. Those rules make the participants push the boundaries and make more extreme videos to keep up with others, which makes more tension and interesting situations. The story doesn't contain much unnecessary dialogue and you follow the events with ease and remain interested, it also contains depth, layers and plot twists; quite contrary to later chapters which are much more some kind of simple gore fest (I didn't get the "catch-the-culprit" episode, I'd say it was a failure, though school episode wasn't bad).

Art: Details are wonderfully done, also gore parts look very realistic and overall it's very well made.

Character: The manga fails somewhat at this part, the protagonists are generic (a shy boy and a yandere girl) with mostly expected behaviour, though the male is making a progress with character, but the rest of the characters are simple and don't have much depth (though, they can camouflage their real intentions, trying to manipulate others).

Enjoyment: Despite shallow characters, the manga is still quite enjoyable. Gore, alright story, tension and element of surprise create a good atmosphere and a decent read.