Great, albeit short experience.

The main story takes 5-7 hours to finish and the only extras you unlock are six wave based challenges, and an extra difficulty called 'God Hard' that's so unfairly hard it feels like they forgot five others before it. It also drastically limits slo-mo time and removes the weapon upgrade system completely making it kinda... bland, I guess?
If real difficult challenges are your thing, then maybe you'll enjoy it.

Also, if you have prior experience playing with controllers I'd suggest one for Vanquish - not because it's 'better', but exactly because it's not. Playing with a KB+M makes aiming a little bit too easy.

Great, albeit short experience. The main story takes 5-7 hours to finish and the only extras you unlock are six wave based challenges, and an extra difficulty called 'God Hard' that's so unfairly hard it feels like they forgot five others before it. It also drastically limits slo-mo time and removes the weapon upgrade system completely making it kinda... bland, I guess? If real difficult challenges are your thing, then maybe you'll enjoy it. Also, if you have prior experience playing with controllers I'd suggest one for Vanquish - not because it's 'better', but exactly because it's not. Playing with a KB+M makes aiming a little bit too easy.