I've only played it a bit, getting increasingly frustrated with how bad it is. Dialogue, characters, they'd be hard pressed to do worse. THese two twins grew up with a bad ass father and mother, training to be killers, and yet they keep acting like idiot fortnight players whooping and calling each other dude. The gameplay is bad, bullet soak enemies that really haven't been even slightly fun to beat. One boss fight so far and it's just a joke, literally just unleashing clip after clip, you couldn't knock him down or stop him moving around. It was one of the most boring and stupid boss fights I've had in years. No tactics, no interest just keep firing, move a bit, keep firing.
The shared life thing is a woeful mechanic, the AI is exceptionally poor, particularly for your sister making it feel pretty bad as a single player game. The weapons don't really feel good, the upgrading weapons system is so uninventive and the need for money means I'm taking out an area of bad guys then running in circles trying to find crates to get freaking coins. Needless gateways put in place such that despite having a supersuit and thus superstrength, until I get the right number of points I can't dual wield light guns or run around with a heavy weapon.
The collectibles are so completely pointless that after the first few I didn't bother checking any of them at all.
Seriously though I can't get past how bad the dialogue/story main two characters are.
Even at £20 I bought it for I'd say don't buy, wait for it to be half price in a month or two. EMEA means europe, middle east and africa, it means the key is only valid for those regions, while the globe on the other ones mean it can be redeemed in any region but as said, it's not a good game, I would wait for it to be much cheaper.