Saw it last Wednesday. It starts off a bit rocky with introductions, it continues as a fast paced movie filled with action. This is a Star Wars movie for the adults. Not just the ones who grew up with either the OT or the PT, but also people who haven't seen SW at all. There is little comic relief, mostly from the likeable sarcastic K-2SO.
Star Wars so far has been pretty straight forward. On one side you have the heroes doing heroic things, on the other hand you have the villains, doing villainous things. Rogue One isn't that black and white. It's grey and exactly what I expected. On more than one occasion I really got this old Marvel comic feel, with the gritty look and action in the scenes.
I really liked the little nods to the other movies and TV series, especially a cameo by two shady fellas.
The weight of the Empire's tiranny and of the ongoing galactic civil war is also very palpable. Citizens and troopers alike, each is tired and weary from this huge conflict. It shows how everyday people deal with it, which is totally different from the view the Skywalker saga showed us.
It's a great start to the Star Wars anthology movies and now I really want them to make a Republic Commando movie
I'll watch Rogue One again this Sunday and probably ten times more after that....