I'm really happy to see a show with no plot holes and a consistent story that is told in such a short form. The ending is only slightly open, but any questions you might have while watching will surely be answered by the end. Didn't get emtional while watching, but the story is still heartwarming with not too much dramatism.
Whatever people say about the plot or the romantic line, the comedy is the core of the show - and it's quite good and well-thought. Not to undervaluate the first two, but comedy is easily the most "special" thing about it, as the rest is almost overused in Japanese dramas these days.
P.S. For anyone out there curious, there is not even a hint of harem genre like in many other host club scenarios.