I caught a few references here (Phoenix Wright for one), but that isn't the point.
I came away from the first episode with an immensely SHAFTy feeling. This feels like something of a return to classic SHAFT screenplays after Vampire Bund (although the evolution of the visual effects is clearly there, having been effected by Bund).
As far as I can tell, this is probably reminiscent of SZS, but of course, I haven't actually seen SZS, so I'm unfit to make that sort of judgement myself. Objectively, though, it is clearly a character driven comedy gag, so I'd say it has at least that in common with the Sayonara Zetsubou Sensei series.
This was one of the titles I was most looking forward to in the pre-season, and although I really enjoyed the first episode, I'm going to need this to "go somewhere" to get anything out of it. I need to see some actual romance or some character development or some plot or something. Luckily, I already detected ample hints of those sort of things, so it seems as thought the writers aren't averse to any of the sort of things I have in mind. It would also be nice if it didn't turn into something completely obtuse like FLCL, but yeah, once again, it's already making more sense than that did, so I don't think that will be a huge problem. It already has a clear direction, or so it seems to me, anyway.