PS4pro player here with normal HDD. Every ~5-6hour I had a crash (sometimes I had none in 7 hours, sometimes 2 in 2 hours..).
The crashes really sucked, because the blue-screen on ps4 needs kinda ~10-20 seconds to get to 100%. Then start the game -> unskippable icons -> cancel trailer -> need to press another button (?!?!) -> then can press resume -> then loading again.
This really takes out the "pace" of gameplay.
Liked the story and gameplay. Mainstory is for me way to short and I have 100% (platin) within~130hours (only 1 savegame/char played). Also around ~30 I changed to hard and sometimes very hard for EP (but getting one-shotted sucked)
The first time I got pissed off, was when I found out I fliped up my chance to buy many legendary clothing blueprints (probably ~lvl15).
Then around ~lvl35 I found out, that my game is bugged and I simple cannot get quickhacks from hacking. Here I made a big save, in hope that this will be fixed for everyone/every savegame. Because then I proceeded to use my points to get to INT20, which was never my idea.. But I wanted the legendary quickhacks
There was then 1 mission with Johny where you search signals and when you jump from above/street into the area, Johny doesnt trigger and its bugged. Luckily I found that out quickly and had a savegame before (PS4 is limited to 20 saves!)
I never had any specialised build, but a general one... So at first I often used Mantis blades, then for some time SMGs, then pumpguns, then pistol and finally tech weapon + massive hacking (you can be really sneaky). Also after the first ending I used the gorilla fists for punching people
So even when many side-missions are more or less the same, it was often different for me (the approach to it). So I really didnt get bored to get the 100%. Was more a time issue, to drive everywhere.
UI bugs/glitches were mostly funny for me, but can be annoying. Also when you drive with >199 into another car and you just send it flying
I liked that more than the realistic version of GTA. Same with running through people!!! Yeah, its not "real" clipping through other people. But it can also be annoying (same with car/bike crashes).
tl;dr:
Liked the story alot, but it was to short. Weapon/game-mechanic have some variants, so even side-quests didnt get boring for me.
But until these 2 bugs get fixed, I dont bother playing anymore. No one even knows why/how exactly the quickhack bug occurs.