I've got to say, I wasn't exactly a fan.
Part of it's subjective, of course. This wasn't exactly the Star Wars I wanted to see after 2016; Star Wars can be many things, but it should be fun, it should be exciting. I was expecting something of a heist film, what I got was a grim and gritty war film. Points to the writers for trying something different, but I really don't think we needed a Star Wars where rebels against the Empire are visually identified with mujahideen extremists, where the Alliance condones assassination in the name of expedience, where X-Wing fighters are harbingers of destruction and tragedy...
It's a film that tries to end on a note of hope, but seems to think the only way to get there is by wallowing in despair in every scene leading up to it. It's certainly an interesting approach, but not really an enjoyable one.
From a less subjective point of view, there's the issues with the characters and story:
( (Extensive Spoilers) )