As a troper who found K-on, Lucky Star and A-Channel to be pretty boring, I was initially skeptical of this show when I first read the concept. "Four Girl Ensemble
having fun." sounds familiar...
This one however proved to be more about comedy than simply girls existing. The characters rarely spend too much time sitting around talking about one particular thing, and if they do, jokes are usually thrown in to spice up the conversation. This troper personally found the show to be entertaining from the first episode, with a silly, spontaneous wit not often seen in a slice of life show.
The music is standard slice of life fare, setting the mood without really standing out. Nothing of the background music catches the ear enough to want an mp3 of, but it does it's job.
And of course where would a show in the slice of life genre be without it's characters? The show actually has two pairs of four girl ensembles, each containing two 13 year olds and two 14 year olds. Each character has a unique personality (though pretty typical for such ensembles). Kyouko is the wild card go-getter, Yui is the deadpan snarker who serves as Kyouko's straight man and so on.
Of course this brings one of the biggest problems the series faces, favoritism. It seems the show almost entirely revolves around Kyouko and those closest to her, Yui and Ayano in particular. Ayano's closest friend Chitose is the fourth most favored character, and her usual schtick, having nosebleeds over Kyouko X Ayano
fantasies, is amusing, but YMMV. While they are interesting characters, I feel that they could stand to step aside and let the other four flourish a little more. The only one that stands out among the neglected four is Akari Akaza, who's more the show's Butt Monkey
than anything else.
For a show with Yuri in it's name, this series doesn't particularly take it to levels you'd expect. A few girls crush on each other, but no one takes it seriously enough to develop anywhere. Most of the Les Yay
of the show involves Kyouko and the trio of tsunderes, two of which are focused entirely on each other. Most of the moments you'd expect from a series with such a title are in the mind of Chitose.
So in short, if you're looking for a short, cute, silly series that doesn't try to take anything too seriously, Yuru Yuri is worth a look.