Fricken Sweet. Runs great on my Alienware Laptop w/ 6GB GTX 1060 w/ 1080P 60Hz G-Sync display (when I get home next week I'll have to hook it up to my 27" 1440p monitor

Sound
Everything sounds pretty good, but laptop speakers (especially these Alienware one in particular) aren't the best to draw an opinion from. I'll have to hook up my Bose 2.1 system to really get a good feel. I may look into a decent set of headphones too. Let's just say I haven't heard anything terrible thus far.
Gameplay
It's a Far Cry game, so everything you'd expect is there, although there are definitely some changes. I haven't gotten too far in yet, but the "skill tree" is taking some getting used to. They combined a lot of elements; e.g., the "Takedown" skill unlocks all of the different takedowns, where they were previously separate skills. You also don't need to worry about skill pre-requisites; if you have the points for a skill, you can learn that skill instead of having to learn a bunch of other skills first. Basically they ditched the skill tree for a "bunch of skills", which eats into the sense of progression, but it's nice to be able to grab the skill you want without having to worry about needing to pick up skills that you might not use.
Gone is the mini-map, which is mildly annoying. Now you can only see your trail if you're on a vehicle or toggling back and forth between the map. I suck at navigating through the wilderness enough in real life...
The Arcade mode is interesting, and I tried out some solo and multiplayer maps, but I wasn't really impressed (a lot of haphazardly thrown together maps and game modes). I'd be more interested in trying out the campaign in co-op. Anyone up for a spin? BW?? I see you've partaken in the madness... might be some valuable research material.

Story... *shrug* storylines tend to take a backseat in these sandboxy games. It's an interesting premise, if a bit unrealistic. Ask me when I actually start playing through the storyline.
Overall, I'm enjoying it more than 3 and 4, but it's a bit of a tossup vs. Primal, due to the completely different environment/style of play. Just scratching the surface, so we'll see how it goes....