I usually don't ride the train of moderately talked animes, but this ride wasn't bad. Being adapated from a 4-koma manga, you really shouldn't expect a detailed story. The characters have a diverse set of personalities, but I felt that the whole "character waitress" had a weak pressence and could have easily been taken out without causing the whole story to change.
After being whittled down from watching and reading a lot of comedy anime/mangas, Blend S has some good laughs. Especially Mafuyu and Miu, both with little screen time yet they still leave a solid impression. Also, unlike other comedy animes I've seen, Blend S finishes with a satisfying ending. It wasn't anything with exaggerated randomness, or something rushed. I guess the fact that this series ended around new years (and I am also a working adult), co-workers reminiscing about the past from the first day they started working, has a nice vibe and left me satisfied enough to give this anime a decent score.
Overall, Blend S is a good anime to fill in your time like any other good comedy animes and I give my stamp of recommendation.