Pros
+Looks Beautiful and Ugly at the same time (Ugly as in portraying the ugly circumstances of the war)
+The way it is shot is incredibly fluid, it's very much a long shot movie but there are maybe 5 actual like hard cuts in this and the hidden transitions are seamless. It really feels like you're walking alongside these messengers while still also giving the viewer an impression for how much time is passing in the story.
+Characters were all believable and likeable. There's some funny banter, there's some emotional release, a bit of fear, some kindness, and it's well acted so it gives the viewer a good impression of who these men are and it makes you want to care.
+Music and general sound design was nearly perfect
+ The story in general is solid. There are some things that I feel won't please everyone (which I'll mention) but I think overall it's a good story. The beauty is kind of in the simplicity. It's all about getting from point A to point B, but having it be that simple it makes room for the viewer to appreciate everything that happens in the journey.
+ You've probably guessed it from the things I've already said but the overall atmosphere is great without feeling like it's up it's own ass
+Very purposeful film. Lots of efficient scenes which seem disconnected at first but end up communicating an aspect of why the messengers are doing what they are and reflect the importance of this mission and/or increase the urgency of what is happening.

Neutral
*The movie is partially about will power and the main character's name is Will lmao

Cons
-I think [spoiler] Tommy's death happened too soon [/spoiler] I understand not wanting to waste too much time but I feel like just a few more scenes would have done a lot for that part of the movie. (FYI this is not a big criticism I kinda knew it was going to happen since the trailer [spoiler] had so many scenes where Will was alone [/spoiler] but it didn't quite mean as much as I would have liked)
-Predictable. This isn't honestly a criticism for people like me who don't really need any twists but I feel like some people would be bored with how straight forward and unapologetically predictable it is.
-[spoiler] in the German trench it says on one of the rafters "I <3 Elsa" a clear anachronism since Disney's Frozen (tm) had not come out in time for WWI soldiers to be fanboying Elsa smh btw I'm joking lol but I did see that in the trench[/spoiler]

Definitely worth a watch