Beelzebub was abruptly ended due to its declining popularity in Japan. Since this isn't the fault of the mangaka, I won't be mentioning pacing and undeveloped plotlines and characters.

Story: 7
Great premise. It was your typical shonen, except this one was actually funny. The biggest issue was that it wasn't really something that would make a reader addicted or feel a sense of urgency while reading- it was very laid-back with no sense of danger. In any manga, usually those over 100 chapters, there are several arcs in which a different or connected plotline is pursued. For Beelzebub, this wasn't the case; it was more like the characters kept getting more and more overpowered. "Willpower" seemed to triumph over any actual training.

Art: 9
Though it didn't seem particularly remarkable at a first glance, the art made up at least half of the comedy. Great facial expressions and really unique character designs. For the plethora of delinquents and villains, the mangaka did a fantastic job in giving each one their own recognizable design. In the action scenes, it was easy to tell what was going on (even though the fighting sometimes consisted of "Oh no! You won't beat me! Look, I'll punch even harder because I BELIEVE and HAVE A GOAL- this will overpower you lifetime of training").

Character: 7
Not much to say here. The characters were no worse than I expected.

Enjoyment: 9
Despite any misgivings or reluctance you may have, you really should read this. It's entertaining and definitely worth it.