First of all, I don't think it really works as an introduction to the series. The main attraction of VAZZROCK is clearly the music, but the anime doesn't reflect that. If it wasn't for the last episode (the concert), you would think it's an anime about actors. The way they introduced the characters in the first episode isn't exactly good either.
Let's start with the animation: typical low budget animation that relies on almost static but well drawn images. But that isn't the problem. I'm disappointed at the lack of 3D MVs. Tsukipro and Tsukiuta had some really good ones, both from the openings and for the final performance in the concert. Nothing here, all 2D.
About the story and characters: there isn't a main plot, but it isn't really episodic either. I liked the idea of 2-episode arcs focusing on a pairing. My main complaint is that there are too many "rivalry" dynamics, even though each pair has a different twist to it, it still gets repetitive. Other than that, they are overall interesting and the characters are all unique.
Sound-wise: unusually for me, background music did stand out, in a good way. Shou's arc and the AU episodes specially, have amazing soundtrack, the former with classical music and the latter with traditional Japanese music. About OPs and EDs, what can I say? They are the reason VAZZROCK (as a whole, not the anime) is great. The songs are amazing, the voice actors are seriously good and underrated.
Conclusion: I love VAZZROCK but I can't really recommend this anime to someone new. Just start with the music if you want to get into it. It's honestly one of the best out there. The amount of music they release is sometimes overwhelming, but quality isn't lacking. Specially in the bi-color series, which is all about solos and duets.
Alternatively, I recommend Tsukiuta or Tsukipro, those anime, while also not masterpieces, are actually good as introductions.
