This manga is pretty much hard-core comedy. The humor is... meh. If you're in the mood to get some laughs, then go ahead. I'd imagine that when a person reads it, they wouldn't bother judging the depth of the plot or characters, because there is little to speak of, just stuff that happens.
Oddly enough, it's not exactly episodic, as if, the author is attempting to execute a plot, but is failing utterly and throws in the comedic fillers. Therefore, for at least half the manga, you're left with a "what just happened?" or "why did that happen?" feeling... well, if you even bother to look that deep. I wouldn't. If you choose to read this manga, do it for the laughs. At least the art's easy on the eyes.
Now that I've revealed the sham of a plot, I'd like to point out the measly character development that does occur. Yes, I know, it surprised me too. The female lead becomes more confident, and the male lead learns to care about someone other than himself. Fair enough. However, when you consider how the entire manga began, these two facts become infinitely more significant, spinning together a nice moral at the end of each little adventure. Individually, the female lead is tolerable. She's funny enough (between her sarcastic thoughts and contradictory actions), and she's got some wit. If the manga wasn't so ridiculous in its premises, she might be even likable, despite the occasional tears. The male lead, on the other hand, is probably the most annoying character you'll ever meet. It took me a while to find the jokes revolving around his personality funny. His supporting characters, by contrast, were far more interesting than his 2-D personality. But since the both leads have plenty of room for improvement, I won't bash him.
My final comment? It's comedy. With nice art to boot. If that sounds up your alley, then at least try it (you'll need about 2-3 chapters to get used to the pace).