I love funny anime. YNSH is a very light anime that has a plot which is not at all complicated. It's good if you want something pretty cheesy and mindless to watch after a long day. Unfortunately, it wasn't as funny as I hoped, and the humor that was there was not at all witty and in fact pretty lame sometimes.
Story: very simple plot, only a microscopic bit of romance. The premise makes you expect that at every given chance, the four boys will be trying to force Sunako to become a lady, but they don't really try that much. In a way this was good because the subliminal message is accepting people for who they are and liking people because of how they treat you, even if some of their hobbies are "scary" or "weird" or even if they are supernaturally good-looking.
Art: All the characters spend a good amount of time as featureless chibis. When the characters were in non-chibi form, I thought the art was pretty bland, and I didn't like the male character designs. They were all angles, plump lips, girly faces, and not at all manly. Some anime characters can legit make me swoon. These men looked too girly 99% of the time, and I was totally turned off to them 5 minutes into the first episode.
Sound: I liked the opening and closing songs (the 2nd closing song better than the first). I actually really like the BGM. There are little themes in the BGM that play during certain moods or types of scenes and I thought it gave the series some continuity. It's also kind of fun sometimes when you hear a certain little jingle and you can think "Oh, Sunako is going to go crazy in a second" or "yup, the boys are going to start dazzling any moment", and then you are right.
Character: The development is a bit more subtle than in some animes, which I didn't mind. Sunako definitely grows more than any of the other characters. The male characters are typical male anime tropes: "cute and girly" pretty boy, tall-dark-and-stoic, player/lover-boy, and hunky bad-boy. It was interesting to see how they all felt differently about their looks. In some reverse-harem animes, the bishies all know it and they love it, so it was refreshing to see that sometimes their good looks even caused some problems! It was also nice to see how very different personalities got along, and neat to see how they had to learn to respect each other's feelings and boundaries.
Enjoyment: after a long day of college classes and work, when I'm feeling pretty brain-dead and blah, this was ok to relax with and got me laughing a few times.