TL;DR -- Go play borderlands if you liked this, it's this but 4 player co-op and actually decent.
Here are the pros:
Looter shooter
Here are the cons:
Confusing level design
All enemies are bullet sponges
Co-op doesn't work anymore, you need to pray to RNJesus that you find your partner with quick matches
The story is dry, and almost non-existant.
Half of the animations are broken
Micro-Transactions
Grind. till you die.