I thought it was good and I appreciated the "old fashioned" way it was made etc with no cgi. But I was left wanting more from it. Part of me thinks that's because we are spoiled nowadays with movies as there seems to be a big blockbuster/epic movie out every other week.
Frankly, what I personally didn't enjoy was the minimalistic approach to the dialogue and character development. The only characters that got a somewhat interesting development during the movie were One Direction guy and Scarecrow.
I finished watching this last night and my feelings reflect what's already been said: The character development was very lacking, so I really didn't care what happened to anyone (and that's a big flaw for a war film, imo), but the spectacle was entertaining. The cinematography was a little inconsistent in my opinion, too. There were stunning shots of magnificent beauty with terrible hand-held shaky cam mixed in every once in a while. That drives me nuts. Also, why did the aspect ratio keep changing? That's just distracting. Pick one and stick with it (preferably 16:9).
I'll actually be a little annoyed if this gets a Best Picture nomination. I don't know why Christopher Nolan gets a pass on so many flaws. Interstellar was massively flawed, too. The consensus on RT for this is extremely misleading...