I'd like to preface this post by saying I have bought nearly every book, and really enjoy this system.
That said, I've just finished reading through the entirety of the Chronicles of the Gatekeeper module in preparation for an upcoming play session.
This is the first FFG Star Wars book that I read through and thought just really wasn't that good. I still plan to run it, but I'm going to have to do a lot of modification and streamlining.
Without spoilers, a few of my criticisms.
1) A lot of go to place X. Do side quests to get your faction up with the locals. Great now they like you and will help you accomplish your quest. (This is my biggest complaint.)
2) The force power really isn't all that interesting. Not sure any of my characters will even bother picking it up.
3) I'll have to tone down the loot. For a starting campaign it's giving out opportunities for top tier light saber crystals, one of which is already modded to a damage of 9 plus extra effects.
4) Many of the side quests seem forced, and like they would be awkward to insert into the game flow.
5) Travel from point A to point B with a list of random encounters. Often the encounters must be forced or seem out of theme.
There are other negatives, but I don't want to risk giving away spoilers, or just spend my post ranting.
There were things I liked. I thought the settings were well well chosen and very Star Warsy. I did like the final chapter, though some of the wandering monster encounters seemed a bit hinky to me. I also liked the overall story arc (or I wouldn't run it.)
I've run one previous module (Jewel of Yavin) and been the player in another. Overall I've been impressed with the quality. I just found this one a bit lacking.