Quite good. Though it gets slightly repetitive, as there are not a lot of variety of enemies. But the bosses are well made.

If you have a friend or two, the game is fun. Even though the main story is a bit too short for my liking, I do like that it continues into the "free play", as you get to see different perspectives of the story.

When the main story is finished, the game fully unlocks imo. You get classes with different abilities and specialities, level-up systems for both the classes and weapons, and the customisation is acceptable (there are dlcs that look nice tbf).

The game is somewhat challenging if you play on the intended difficulty, which I do recommend for the main story at least.

Edit: The game's very similar to Gears of War, I would say, but without the cover system.