I find it not too bad. It's better than making it CG animation instead of live action unlike Dragonball Evolution and Speed Racer. It's a shame it flopped at the box office and no one really talks about it because it's not around Disney or Pixar levels of quality. it does follow a little bit to the original source material even though Astro is wearing clothes because censorship of half naked robot boys is a no-no for the US?
Anyway, it's a decent adaptation and I was hoping other classic anime that follows Astro Boy should get an animated film adaptation like Gigantor and Tobor the 8th Man and get a similar treatment without Hollywood destroying them.