as someone who has not interacted with the manga or decode, i think its pretty good! its nothing too special, but i enjoyed watching it! i liked the artstyle, the music is real good, the characters all have memorable moments. its fun! its a very neat fusion of a schoolboy slice of life, and a sci-fi magical girl anime. i do kinda wish that this anime was able to escape the OVA mines because i would have loved to have watched a longer series of this anime, and from a glance im not as much of a fan of decode's artstyle. episode 1 was alittle bit of a slog at times, but the rest of the episodes are paced pretty well. if you wanna watch a short, sweet 80s action anime with good characters then you'll probably enjoy it!