Ok So I'm just going to warm you, it is very long, it does drag on (in my opinion)
The only way I can some it up is fighting walking fighting talking fighting walking (and so forth)
For me- it didn't interest me, wasn't much to think about, in some ways kind of predictable it to a while to get to the point, (I felt like it could of been two films, it dragged on) but hey, if you are into lots of fighting with orks then you will love it.
I know a lot of people will disagree with me but just my opinion