TL;DR at bottom
On the surface, this show is nothing but another moe "cute girls doing cute things" show. That's literally all it is, too. There is no plot at all, and there aren't any weird circumstances really, it's just normal girls doing normal things but some of them happen to have crushes on others.
Saying that probably makes you think that this show is just boring, and while it is slow paced that is not the case at all. I've seen my fair share of moe shows, and this one is one of the best. The jokes can actually land, and I laughed out loud at least once an episode, and chuckled or smiled far more than that. I basically was smiling the whole time. You will too, because these extremely cute girls are also extremely funny.
The art isn't anything special and neither is the ost. The op and Ed for the 1st and 3rd seasons are just normal with the 1st season being slightly better, but I watched the 2nd season op and Ed nearly every time. The 2nd season is probably one of the best, if not the best, op and ed combinations I've watched. Usually it's just one that's really good, but they were both awesome this time! (especially kyoko in the op)
That's not all that's good I have to say about this show.! The characters are actually more than one dimensional! They act like anime characters, but at the same time they are extremely believable and do stuff that I would too. This makes it wayyyy easier to relate to everyone, and makes all the jokes funnier because of it. Also toshino kyoko is the Best Girl for sure, and is in my top ten all time favorite anime characters. She's extremely funny, and believable as well. Akarin is also amazing!
The yuri in this show plays a part, but don't watch this expecting everyone to get together. It's mostly used for laughs and a few touching moments between characters.
The reason I'm giving this show an 8 and not higher when I love it so much is because it's still just moe, there aren't really any emotional stakes in anything or any overarching plot. That's why I gave k-on a higher score, because of those emotional beats. Regardless, if you are looking for a moe show to relax to, THIS IS THE ONE!
TL;DR: on the surface this is any other moe show, but in reality it's really funny and the characters are relatable. A must watch!