Twin Signal tells the story Professor Otoi, a famous robot maker, who, by request of his grandson Nobuhiko, makes his latest creation, a fighting robot named Signal, something akin to an older brother figure, but during the programming Nobuhiko sneezed, and therefor set a bug on Signal's system...
The story takes a light flow, easy to follow, where you can easily understand what the characters are feeling and what exactly is going on. Big, pointless battles are out of the question, and while there is action, it's overlooked by the comedy and the somewhat peaceful, logical resolutions to things. The humor is also pretty good, not recurring to inside jokes but to forms of entertainment that would amuse all audiences alike. As for the animation, on itself, it's pretty good, one of the best I've seen up to this point! It's a movie that you can actually watch over and over and not get tired of it, and it serves as something nice to watch at any time.
I suggest this movie to anyone, people of ALL ages, who just want a taste of something different, but not too much. Old school and yet, innovative of it's own, it's content will leave a good impression on you, while you may not be pondering the meaning of life, and with endearing characters and story, truly a light and enjoyable experience.