Most of this review is from before 100 percent completion but still completely applies.
It's good, but I can't say I like it more than Complete Saga. So so many factors go into why, but I'm just going to make an "abridged" review here (yes, this is the abridged).

One, the levels take a backstage to the open world. The open world has minimal improvement from previous installments, but has a larger amount of quests, causing it to continue having the same problems of repetition and uninteresting gameplay that the previous LEGO games have had.

Two, bugs are a pretty common occurrence. Not usually game breaking ones, but noticeable ones. Again, nothing new to the LEGO (and Traveller's Tales) scene.

Three, following up on the level design, it's arguably not an improvement on Complete Saga's. I will say that things like the lightsaber combat and star ship battles are much more fun, but things like cover shooting, quick time events and the bloated amount of walking from place to place aren't as great.

Those are my biggest issues. I have smaller nitpicks, including strange music choices (like the Naboo chase music during Dooku's battle), but they're not things that I expect anyone else to care about. I know this sounds like a pretty lengthy rant, but there are plenty of good things about the game.

The comedy is spot on. Cutscenes have even more charm than the Complete Saga ones did. Lightsaber duels, again, are awesome. If you've got a friend it's a lot of fun to play around in the hubs. Speaking of friends, puzzle quests are great for them. If there is one thing I loved about the open world it was the puzzle challenges. They are the most creative part of the game and perfect for co-op.

The worlds are beautiful. A lot of them reminded me of layouts from Battlefront 2, which were equally as beautiful. The characters themselves now are modeled to look like actual minifigures, so they have more toy-like features, and particles of snow or sand can get caught on their capes or headpieces. Poses and animations for the characters are more unique than ever before, I absolutely loved watching the different ways Jedi would swing their lightsabers.

It's kind of hard for me to rate this game at all, I'm very mixed on the overall quality of it. But I will definitely say that tons of passion went into it and it's worth a try if you've got some time to kill and a friend to do it with.

EDIT AFTER MASTERY: Wayyyy more bugs than I originally thought. Ones that stick with you permanently as well. Almost believed I was completely hardlocked multiple times. As I expected, there is nothing really rewarding about going for 100 percent, nor is than any actual reward for doing so (unless you count the trophies). With all the reused missions and terrible loading times, it's just not worth the effort.