I like the Astro Boy series (60s, 80s, and 00s), all of which are a little different from each other, but with a lot of the same heart. So when I watched the movie, well it left me feeling a bit...weird.
Now a lot of people like to complain about the voice acting, and character designs, and the art and animation style. I don't have any problem with those things though. The character designs are faithful to the source material, but with it's own CGI twist; just like each series had it's own little art twist based on the capabilities and budget at the time. Each series also had it's own voice actors, and the VAs in this movie did a good job at bringing their character's life.
With that being said, this is like a 10 act story, with a couple acts cut out. There's the establishing act with Toby's death and Astro being created; the next act is Tenma trying to use Astro to replace Toby, but then finding that he can't so easily replace his dead son; the next act follows Astro making friends and trying to come to find his place in the world (robot or human), only to have the world (the surface) kind of reject who he is and instead thrust their own idea of who he should be onto him; and then we just jump to the final act where the villain's monster becomes too powerful and now Astro has to save the day (which has many "self discovery of powers" elements that should be reserved for middle "figure out your powers" act, not "final climax battle").
If you ask me, this should have been a TV series. It has all the potential to be another great incarnation of Astro Boy; Astro Boy origin, figuring out how Astro fits into the world, and characters that have a lot of potential. Unfortunately, a lot of elements that should have gotten their own episode (metro city's trash culture, the robot resistance, the girl's parents, Astro pretending to be human with the surface dwellers, the robot games, fixing up ZOG, competing in the robot games and his new friends coming to grips with what he is, the government trying to shut him down, why the president wants to harness the power of the red/blue core, etc.) were just kind of rushed through.
I enjoy the movie, but I just feel wanting more.