Before you read the manga, you can take my review and others as comparison to what you imagine.
Horimiya (Hori-san to Miyamura-kun) use so many perspective, that is the good point of the manga, you can know what the feeling of the other character of something.
Story: 8/10
I give 8! Subtle yet charming love story inside! Prepare your heart (ultimately for anyone who are single). A lot of romantic, less cliche love story inside.
Art: 8/10
The art is so smooth, clear. I should give the author 8 thumps (if I can)
Character: 9/10
The development of the character is so good, I like Miyamura-san development. Hori-san is so adorable here