Very crafty movie. Not so much of an action flick, or romance, as a "thinking" movie. It's not what you really expect it to be.
Yeah, the screen writers/authors took some liberties with reality, which among other things shows that they had very little knowledge of the military OR Rangers, but that's OK. Also, you'll have to forgive the "magic" sequences, soldiers appearing from nowhere, superhuman soldiers, etc.. But, that too, is about par for the Hollywood course.
The acting was pretty good, and I really don't like much Travolta has made. Production quality, "B+", i.e. pretty good. The plot was intelligent, i.e. something that keeps you thinking. I object to the writer "hiding" details in the story development, so that the complex, multi-plot ending looks just amazing, but again, that's not unusual.
So, about 4.5 stars from me, probably should be a little bit lower, but I'll toss in a 5'ver. The movie drags in a few spots, that's my "negative".
Overall, I don't regret the time spent watching, was entertained, and unfortunately, I can't say that about 95% of what's offered as "movies" or "TV" today.