The first and last episodes are fine. It's like the first season, but with new plot. There may or may not be some
Art Shift if you look from close enough. If you hate
Suzumiya Haruhi, you will hate it too, if you liked it, you will like it too. There is nothing else to tell about it.
Now let's get to the interesting part:
Endless Eight It is a frequently heard opinion, that Endless Eight was just "trolling", or
Kyo Ani wanted to screw with the fans, or they did it only for the money.
From the fans' side, you can hear the defense, that it has a significant artistic purpose, as it is significant to sympathize with Yuki's boredom.
I believe that all of the above is wrong. First of all, watching the same thing for a few hours is hardly similar to getting trapped in the same weeks for hundreds of years. The former is "somehow boring", the latter is "insanity-inducting".
On
Kyo Ani's part, I'm sure that they didn't expect to have a normal reception, so the only reasonable explanation is that they were
Doing It For The Art.
To understand Endless Eight's significance, imagine an alternate second season
without it. It would have a Disappearance arc, maybe even a Snow Mountain Syndrome. Surely, would be fine. Probably it would be good. Maybe, it would be great. But ultimately, it would be just another season for just another anime show, that some people like and some people hate. No matter what it would show, it could be described with the first paragraph of this review, and the Internet would also be a dozen memes shorter.
But this way, we have
the most boring series ever. And paradoxically, this attribute is what makes it unique, and
interesting.
While watching it, I was laughing. Mostly at myself, as in "Oh my God, I can't believe I'm still watching this crap", but I also laughed at the characters (I Laav you), and sometimes at genuine jokes like Kyon's random
Evangelion Shout Out that was only in a single episode. At the endings, I was excited, then melancholic, and at the final ending, relieved. I doubt that any other plotline could have given me that much laughing, excitement, melancholy, and relief, so even if technically it didn't have enough new content, I would say, it was worth my time.