It's running at a solid 60 FPS for me @4K, the developers have done a good job with this one. I was reluctant to buy it after ACU and FC4. I waited until after launch and picked it up from SimplyCDKeys for around £25.
There are a few minor glitches but nothing game breaking. I don't regret buying it
+1 , this game is by far the least buggy and most optimised release on ubisoft so Callender , pretty sure if they'd had this in a playable state and released sooner , there sales of even the bugged messes would be fair higher if released after the crew.
Constant 60fps @ 2560 x 1080
Bugs include
Joining a crew and not having the network sync you all quick enough forcing you to wait 5 mins for your buddy's to appear or forcing you to join a race to force the connection
Random disconnections to the main menu , but i believe this is down to sever stability not the game itself .
Driving inside the cockpit produces a random screenshake with tearing m thought it was due to my 21:9 aspect ratio but others seem to suffer this as well
Physics do become pretty laughable during big crashes and the police are in little starship enterprises the way they can catchup and go round corners .
Plenty of jaggies even with 8xmsaa or txaa x4 but hardly a bug just more a limitation
Now and again when on own or with crew , the loading screen for races stay constant in cycle ... Forcing you to restart the game.
Had one major crash , where it forced all sounds really slowly and techno , this was also in the beta but happend far more frequent, only had it once in around 28Hrs gameplay
It's a good looking game when caught in the right scenery and lighting but make no mistake this was a launch tittle for current gen . pushed back .
I actually payed full price £40 offer at Ubi store ( NO Fing Steam ! ) and actually don't regret a penny ... Even if this game received not one more patch which I hope it does . It's the best of the bag product science GTA singleplayer for me