I have the game, so just a few personal thoughts about it on a technical level:
I tried it a bit yesterday on my G1 980 Ti and i7-6700K machine (16 GBs DDR4-3000). It was at 2560x1440 (60 Hz) with everything at their max settings except AA which I disabled entirely because post-process AA is blurry garbage. I do have a 512 GB 850 Evo SSD in my build, but I put Just Cause 3 on my HDD instead. Maybe that was a mistake because of load times.
Right off the bat, the MSI Afterburner overlay doesn't work with the game, so I'm never really sure how much it stresses my hardware at any given time. I do get 60 FPS constant until a bunch of explosions go off simultaneously and it drops sharply for a moment (could just be double-buffered Vsync doing what it does best; ruining fluidity and having no right to exist over triple-buffering). The explosion physics are beautiful and very detailed, but at the moment, I'm not sure whether my GPU, CPU, or Vsync are responsible for the FPS drop without the Afterburner overlay.
Several other issues: occasional texture flickering, one crash, annoying title screen and load times (including the map, which is always blurry for a couple seconds after I open it), and I'm getting reaaaally sick of worthless post-process AA only options. Also, while the explosions and physics are fantastic and the setting is pretty, general graphics quality is pretty mediocre imo. Especially textures.
I haven't updated drivers and don't think I will if they're locked behind GeForce Experience.
Other thoughts: The controls are kind of wonky; I miss being able to sprint like in Just Cause 2, I can't remap the cancel button away from ctrl, parachuting/grappling together feel awkward and not as fluid as in Just Cause 2, the grappling hook's range is a little short, and the game's button prompts don't seem to recognize remapped keys which is annoying. The game is fun though, if only because of sheer destruction and the wing suit (though it's a bit difficult to control).
Still, I find myself a little disappointed, but it was worth $25.