Non Non Biyori is a work of art.
Everything is so well done, the soundtrack is so soothing and calm, the background art is gorgeous, and all the characters are very likeable, original and most importantly very varied. I'd be lying if I said this anime didn't make me feel warm and happy inside, because that's exactly what it did. The whole setting is very nostalgic, there isn't a whole lot of story if that's what your into, though the creators do make an effort to keep it interesting.
It's definitely worth the watch, I'm hoping I can say the same about the second season as well.