I had fun with this one.
Gameplay is excellent, many weapons and parts so you can build the armored core of your liking. You can get quite overpowered with the right build.
Story presentation is kind of lacking. I didn't really care for it. It's told in radio calls and messages and you never see a human, just mechs. That's fine though, the gameplay makes up for it.
You have to do multiple playthroughs to unlock all the missions. It's nowhere near the level of what the Nier games do with new game+. I would have preferred it if all missions could be done in one playthrough. You end up repeating a lot of the missions.