Despite having a nice, aesthetically pleasing, jiggly bunch of both boobs and butts and being little more than pure ecchi most of the time, this anime managed to worm its way into my heart. Think Free!, but with less gay and more comedy. Every episode is doing pretty darn well in comedy departments, it always sticks to the story at least partially and there is enough of fanservice for everyone, which is truly something to commend.
Nice summertime music and quality VA.
The characters themselves are a breath of fresh air, since most of them aren't COMPLETELY one-sided to the point where you can predict their every move and some of them have a little something secret going on on the side. The screen time most of them get is also pretty enjoyable, so if you're into finding out about the supporting cast, you will be pleased.
A rare ecchi that's actually enjoyable in terms other than "sexy".
Probably underrated.
You'll love it to death, guaranteed or your proverbial money back.