I haven’t seen the original, but I understand that the allusions haven’t transferred well. Nevertheless, I thought the makeup was excellent, and though sometimes awkward, the use of ape-style gestures and body language a valuable element.
As a sci-fi fan, the implicit world-building is unsurprisingly my favourite component of the movie. There were some confusing points (like how the real monkey is treated by the evolved monkeys), and some not-so-convincing points (when one character, feeling betrayed, turns on another). The strange love triangle involving Helena Bonham Carter raised my eyebrows at first, but was a little bit touching by the finish. I thought the ending was needlessly weird, an attempt to one-up the original’s twist that didn’t work out.
I’m interested to see Rise of the Planet of the Apes (despite the unnecessary “Planet” used merely for branding), though it seems like it does not follow this movie’s continuity.