Robotics; Notes was a very fun, if confusing, anime to watch. First it seems like an anime about some kids in high school building a giant robot; and, well, that's just part of it.
I absolutely enjoyed the heck out of this anime. The characters are great and it's hard to dislike any of them. The story is interesting, too.
When I finished it, I was satisfied with the ending, but still left a bit curious about the missing plot holes. That's why I only gave the story a "5". The plot tries to go into too many different directions, leaving the view a little confused.
Despite that, I'd definitely recommend checking out Robotics; Notes.