It was entertaining, but I can't accept it as a "real" event in the Trek continuity. Classic Planet of the Apes is just too fanciful. There's no way a few thousand years of evolution could produce such humanlike great apes, not to mention that it got all three ape species' psychology backward (chimpanzees as pacifists when they're actually the most warlike, gorillas as warrior thugs when they're the most placid unless provoked, orangs as the social and political leaders when they're the least social great apes). Also, how the heck were they speaking 20th-century English? Not to mention that the movie series's continuity is a mess, with virtually every film having to retcon something about the previous film(s) in order to work. Originally Taylor's crew just lived 2000 years in cryogenic stasis, but then it was retconned into a time warp, and then the world was destroyed, but then we found that the apes were somehow able to launch a space capsule with no launch stages or gantry or rocket fuel or industrial infrastructure to create them, and then we were told the cats and dogs had died out and the apes had gradually been domesticated over centuries, and then that whole process was retconned to happen in just 20-odd years, etc. The films don't even fit together with each other, let alone with another universe.
Plus, the comic tries to fit into the chronology of the movies, but it kind of glosses over the events of the second movie as if they only happened in the course of a few days. Which was a confusing, rushed, and anticlimactic ending. (And they missed an opportunity to explain how the space capsule could've been relaunched. They could've had the Enterprise crew help Cornelius, Zira, and Milo escape the Earth.)
