Not much more to say than on Part I; the episode was designed so that the original 1964 pilot, "The Cage", could be shown as part of the regular series.
This part relies much more on old footage from "The Cage". That is both good and bad; Good in that "The Cage" was a great story, but bad in that there is relatively little new material, and does very much have the feel of a recycled episode.
Without giving anything away, I did feel that the conclusion of the story, with the revelations about Spock's trial, to be slightly questionable, and causing a couple of plot contradictions from earlier scenes.
This is by no means bottom-of-the-barrel material, but there are episodes that I enjoy far more than this one.