I suck at it (i think i have to beat every enemy in a level to get to the next?) but man it is satisfying as hell to grapple around and shoot at the floating dudes and the worms.
I actually kinda prefer not being able to pick guns, rotating through them feels really nice.
I kinda wish you could just grapple with left click and shoot with right click, instead of swapping between them.
definitely scratches the devil daggers itch