It was a nice fun addition to season 1. Nothing important or necessary, but definitely fun to watch and entertaining.
The character traits were well defined, the battle was enjoyable, and well; having more Boku no Hero content is always nice. The quality of it is obviously not as good as the actual show, but it's only twenty minutes of a short, so it's not a big annoyance.
If you want more MHA content, you can watch this.
It's fun and a nice addition for My Hero Academia, nothing less, nothing more. :)
I give Boku no Hero Academia: Sukue! Kyuujo Kunren! a respectable 7/10.
