I'll be the first to admit, I liked the anime due to personal reasons.
If you've faced isolation in your life, social phobia, angst, etc. (like half of all teens everywhere), then this anime will really sink in deep into your heart.
If you're among the other half, and you're interested to find out what it's like feel isolation, social phobia, and angst, etc, then this anime is for you as well.
Here, apart from the sociological aspect, you'll find a cast of interesting (not always likable) characters, a great plot, and sprinkles of surrealism/insanity.
Enjoy!