The first two acts were solid, but not-particularly memorable. It took a bit for me to get into the film, but once I did, I was completely on board. The final act was great and really ties well into A New Hope. It wasn't nearly as good as TFA, nor did the visuals really do their job at popping until the final act. It's a well-made film though and is a solid B+, with an ending that resonates as a high A/A+ final act.
I definitely won't be skipping this one in my Star Wars marathons.