It seems like most people feel lukewarm at best towards this book, so I felt like I was missing something when I realized I enjoyed it immensely after finishing.
Is it consistently funny? No, not really, but it's highly entertaining. Maybe Negi Banno and I are on kind of the same mental wavelength, so the characters, the amusing situations, the otaku-type references (9video games!), the use of the old (and newer) cliches, the slight ecchi factor... they all work for me.
Maki's personality, and her tendency to whang her knee into doorframes and the sides of desks, remind me very much of myself (uh, for better or worse). Nagumo's perhaps a little too indistinct from her particular cliches, but Arai gets away with it a little better because of her interesting relationship with brother-Maki and her sarcasm. Karasuma, unfortunately, is the weakest of the four for me, probably because (and I kind of hate to say it) her secret crush on Maki is really the only thing that constitutes her character, and it's neither as over-the-top or as let-me-get-your-clothes-off as that sort of archetype needs to be in order to work, especially in four-panel manga situations. But put them all together, along with brother-Maki and the other named (but as-of-yet largely unexplored) other teachers, and it's a cast whose escapades I find to be lots of fun.
The book reads really well, which is pretty cool considering some of the space restrictions and all that. I too had the "eating it in an epic way" line jump out at me, though not in a bad way, even if it is skewing a bit more colloquial than it needed to. (But hey, what do I know; I'm partly to blame for letting a "Bring it!" sneak into volume 2 of .hack//XXXX, because I thought it worked. So...
I love the character designs. The art style is indeed a bit rough, but I wouldn't call saying so a knock against the artwork as a whole. The cover shot of Maki is what really got me to pay attention to the book in the first place. And Yen Press deserves major kudos for including all the color plates from the original magazine printings (and I want that Arai dakimakura, dammit!).
Want more! Want more now!