First of all, it's nothing like Lucky Star, aside from the "four girls" and Slice of Life
aspects. I get entirely different feels from the two shows.
Second, while there's great humor to be had, I also find the show oddly emotional. I mean, Tooru has to deal with her best friend's being in a different grade than she is, which means she has friends Tooru otherwise doesn't know about. I'm sure there are plenty of people in Real Life who have gone through that feeling...
Which made the mass-hugging scene all the more touching.
Anyways, I'm a sucker for Slice of Life
comedy shows, so I'll be continuing the watch.