Equipment: Lots of equipment. In the weapons, devices and armor, nothing really stands out as a must-have, but that's not to diminish the quality of the gear; there's a lot of good stuff here.
Plenty of cool droids. Now you can play as a midwife droid or pit droid, among others. Basically, if you saw it in the prequels, it's in here. Pit droid is actually a surprisingly good option to play as, since they've got pretty good stats and they are specifically said to take no penalty to carrying capacity for being small.
Starships: This chapter just covers the non-aligned ships; Republic and Separatist ships are covered in their respective chapters. The Barloz-class freighter is an extremely affordable transport at 17.5K used (with a deck plan, to boot), and it's pretty durable (even comes with a shield generator), but it's lightly armed. There's a wide assortment of other transports and starfighters, too.
Clone Wars Campaigns: Tips for running campaigns in the era. Pretty good, has tips on running Order 66, how to incorporate Jedi, how to write cool villains. There is also a section on writing "battlefield adventures"; it includes rules for making squads of troopers that act as single characters. The biggest deal is the mass combat rules, which detail how to have gigantic battles that feature armies attacking each other. The rules are pretty short and simple, letting you create troops and vehicle units, and telling how to run them for characters who may serve as commanders. I may have to run a gigantic battle between the Republic and Sith just to try them out.
Galactic Gazetteer: This section details a whole lot of planets: Cato Neimoidia, Christophsis, Geonosis, Glee Anselm, Iktotch, Kalee, Kamino, Kerkoidia, Malastare, Mustafar, Muunilinst, Nelvaan, Polis Massaa, Sembla, Skako, Teth, Toydaria, and Utapau; it also discusses the "main" planets and what's happening on them in this time period.
The Jedi: A whole lot of stats, both for generic characters and specific characters. Statted out: Anakin Skywalker, Obi-Wan Kenobi, Yoda, Mace Windu, Ahsoka Tano, Kit Fisto, Nahdar Vebb, Ki-Adi-Mundi, K'Kruhk, Plo Koon, An'ya Kuro, Aayla Secura, Saesee Tiin, and Quinlan Vos. I have one big complaint about these stats: most of them read Jedi 7/Jedi Knight 5/Jedi Master 1, and all of them have the Force Point Recovery technique. No originality in any of the stats, and between Anakin, Obi-Wan and Yoda, only one of them has even a single change: Anakin has one different talent, so the iconic three don't even take advantage of any of the new stuff in the book. Wasn't the idea of making Jedi Knight a prestige class that not every character had to take it, and you could be a Knight without ever actually taking levels in it, ditto Jedi Master?
There are a few Jedi ships here; mostly iconic Jedi starfighters and different variants. For example, with the Delta-7 Aethersprite, you also have a high-speed variant, a high-maneuver variant, and Anakin's specialized model.
The Republic: The chapter begins with a look at the organization of the Republic, including the Senate, the Supreme Court, and the Supreme Chancellor. It then looks at the makeup of the Republic military to give an idea of how it's organized. Then come the clones: lots of clones and clone variants. Some of them look badass, like the blaze trooper (which has a jetpack and a flamethrower) and the clone assassin; some look silly, like the subtrooper (for underwater action). The chapter also stats out some of the most prominent Republic military and political figures. It then details a number of Republic droids, vehicles and starships. Especially the latter two. If you've seen it in any Clone Wars media anywhere, it's statted out here.
The Confederacy: Similar to the Republic chapter, it spends some time detailing the organization and military forces. It then stats out Count Dooku, Asajj Ventress, Durge, and General Whorm Loathsom, before moving on to lots and lots and lots of droids, vehicles and starships. I should point out that these sections include a sidebar to point out where other Republic, Separatist, etc. stuff is statted out; for example, if you're looking for Lucrehulk-class battleships, the sidebar points out you can find them on page 146 of Starships of the Galaxy. There's more droids, vehicles and ships in this chapter than I want to count, but I will point out that Grievous' wheel bike from Episode 3 is statted out. I always liked that bike; it was pretty popular in an old Star Wars campaign I ran. It also includes Grievous' flagship from the new Clone Wars cartoon series, the Malevolence, and stats out its ion pulse cannon that is capable of really putting the hurt on Republic fleets.
Fringe Factions: This is pretty much the "everything else" chapter, and it's pretty short. It stats out various characters like Chewbacca, Boba Fett, and flamboyant stereotype Ziro the Hutt. It also stats out a few vehicles and ships, as well as two creatures. Lastly, the book includes a giant appendix that indexes all the characters, droids, vehicles and starships by Challenge Level.