My spoiler-free review:
While I overall liked the movie, there were a few things that, in my opinion, could have been handled better narratively.
The bad: It was Episode 4...it really was. That's not necessarily a terrible thing, and I completely understand the reasoning for why it so strongly echoed Episode 4...but it felt a little heavy handed at times.
The revelation Kylo Ren's backstory could have been handled a little better. I think it would have added more of an emotional impact if the revelation would have happened on the bridge near the end...my opinion of course, and it's a minor gripe.
The scene between Han and Leia was too short for me...it's been over 30 years since we've seen them together, and considering what was to follow, the scene lacked emotional gravity for me.
The long, drawn out scene where Kylo Ren was using the force to interrogate his prisoner....that could have been easily reduced by a couple of minutes.
I understand the idea behind the First Order...I'm fine with that. But if the New Republic is the current ruling body of the galaxy, and the First Order is effectively a terrorist organization fighting against the New Republic...why is there a resistance? I supposed I shouldn't think too much about it...the logic behind Star Wars politics can be mind melting (an elected queen who should be under the age of 15 comes to mind...). There were a few times when I had to suspend my disbelief and just enjoy the movie...but that isn't a negative thing, necessarily.
The Good: While the movie was 2 hours and 15 minutes long, it didn't feel that long. It was action packed, and with a few exceptions, very little of the screen time was wasted.
Harrison Ford was magnificent, as usual. The interplay with him and Chewie was spot on!
Speaking of Chewie...he stole the movie for me. Even though he really had no "lines" per se, his personality was quite evident. All throughout Episodes 4, 5, and 6, it was mentioned never to make a Wookie angry, and in this episode, you finally see why. And oh, is it glorious!
I think the most important validation for my review was that I didn't want the movie to end.