I've seen it three times. Twice in IMAX.

My thoughts have been made pretty concrete now. It's a great movie, but not a very good Star Wars film.

It completely rejects the path setup by The Force Awakens not only in the mysteries it decides to let go but also by ignoring entire plot threads. It is as if the events of The Force Awakens never occurred.

In addition, it feels like a finale to a trilogy, not the critical turning point leading into a final film. I imagine there will be a pretty big time jump between this movie and Episode IX which will be strange considering the first two were so close together. And if it doesn't, what sort of story do they hope to tell by the end of this trilogy?

I liked Episode VII enough...but I gave it a pass because I felt Episode VIII would make it a better film and we'd look back and appreciate what they setup. The Last Jedi actually makes The Force Awakens worse.

They should have made this a side-series and not part of the main episodes. Nothing I've seen so far makes me think this is a trilogy sequel designed to finish out the first two trilogies. Instead, it feels like fan-fiction. It's a three-movie setup for a 4th trilogy without the Skywalkers.