WHY: I recently finished the heartbreaking Clone Wars TV series which naturally leads in to Star Wars: Episode 3 - Revenge of the Sith, but did not want to rewatch the film - instead opting for a novelisation and my first Legends material due to the stellar reviews.
DIFFERENCES: I really liked some of the additional story material and artistic vision presented here, especially in the first half of the novel. There's a deeper introspection into Anakin's thinking and character through his perspective, as well as masterful manipulation from Palpatine in both the condensed timeline and manoeuvring of key players. Further, I really enjoyed the image of Coruscant bathed in blood-red flames and smoke due to the opening battle, and wish this detail was more relevant in the canon - it fits the story's themes of darkness and subterfuge.
WRITING: The writing overall was good, but unfortunately I had a few issues with the exploration of the dark and light theme. At times it was very cool, especially in regards to Yoda and Sidious, but also had me confused with its concluding message after being prominently interweaving itself through the plot. Also, some Star Wars action just can't be translated to page - whilst it was interesting to learn about different droid thinking and different lightsaber forms, it is much more captivating to watch a space battle or Jedi and Sith duel.
WHO: Really, really for the hardcore Star Wars prequel trilogy and Legends fans. Otherwise, this novelisation is very much skippable for the rest of the reader base. The film and its visuals not just cover the story better but add more perspectives and emotion.