This show is somewhat difficult to rate and recommend, mostly because it has very specific and mature qualities, rather than being straight up exciting like some expect out of anime. It's about a bitter, socially awkward 15 year old girl that tries her hardest to fit in and become more sociable, but her fear and misunderstanding of people cause her to fail at it over and over again.
If you are the person that gets a lot of second hand embarrassment from witnessing awkward situations you are in for quite a ride. Feeling strongly related to the heroine, personally, this is what attracted me to the show so much. If it can make you feel things, than you know it is real, relevant, and it is refreshing to experience it from a third point of view. The people who made the show understand deeply what it means to be a shut-in.
If that sounded scary, don't worry! The whole show is done in a light comedy tone. If it wasn't, watching it would be downright unbearable. There are a ton of hilarious references to other popular anime.
I would strongly recommend it to people who experienced some degree of social anxiety while growing up, or people who want to understand it better.