Overall impression:
At first it gives a vibe of a pure comedy, but it has a surprisingly deep serious part to it. While it is written in the humorous style with no trace of a dramatic atmosphere, the characters and the problems they face are actually quite realistic and sympathetic.

I usually don't read comedies, but this one got me hooked. I wish it was written in a more serious style, but that's just my preferences.

On the objective side:
The general quality of manga is quite good, story is well-paced and not too cliche, humor is on a decent level and doesn't get too stupid or exaggerated, characters behave naturally, true to their personalities.