I started reading this mainly because I needed to balance out all of the drama and shounen mangas I read with some comedy, and this DEFINITELY did the trick!
Story: It begins as a revenge story and develops into so much more. Even though it still is about getting back at a guy, it also incorporates finding one's true identity after being dependent for so long. It discusses vulnerability and how pain, although no one likes it, is necessary for growth. It is heartwarming and also hilariously comedic. I cannot count how many times I have literally laughed out loud or had to take a moment to recollect myself while reading this. It may not be COMPLETELY realistic, but the emotions behind it are real enough to make a believer out of anyone.
Art: The artwork is really good for the most part. The flaws only really occur in the males of the serious; sometimes they are drawn disproportionally tall and broad. However, besides that the art is great, ESPECIALLY when Kyouko goes through her "transformations". The clothing and the facial expressions are drawn well and realy capture the essence of each role she takes.
Characters: So good!!! You will be rooting for the main character the entire way. She isn't perfect either. Most of this manga is about her finding a way to accept love back into her heart, however she is fiery, energetic, strong, and most importantly, the kind of heroine that someone can relate to. The supporting characters are well defined as well, each with their own set of personality quirks that make them fun and refreshing. There may sometimes be a lot of characters and it does sometimes get hard to keep track of, but they are all so fun that this doesn't become an issue.
Overall: A great manga that is doing things right. It is fun and entertaining. It also does go into deeper topics without losing the levity that the story relies on. It is a great read for all times. Definitely one to read!