I have it for PS4. I'm not going to start a platform war (I am a casual gamer, although I have a decent PC too), but it's good on PS4, and you'll need an expensive PC to achieve significantly better visuals.
I'm playing the campaign from the start in FPV (without aim assist), just done the 2nd lester mission with Michael, no problems so far, actually enjoying it more than ever. Have fun playing the waiting game.
PS: Input lag in GTA is aparently down to the engine they use and the animations of the character models. Only now in FPV it shows more than ever. I don't think that will be any different on PC. First person view feels very different than any other game i've played so far in FPV. Nothing you won't get used to after half an hour of playing tho... FPV is a complete game changer in GTA and Rockstar did an amazing job with it.