All in all, from what is surfacing the game seems to be in the state I was expecting: overall well done and with interesting content, but also with some general jank and more than a couple of bugs and technical issues. Which makes sense, because it's exactly how The Witcher 3 also came out: great writing, a lot of content, serviceable combat (but poorly balanced/kinda exploity once you got the grips of it), poor world navigation (horse that gets stuck into every bush and cobble and spawns on house rooftops), and quite buggy at launch (corpses physics breaking, quests not awarding EXP, crashes to home etc.).
The PS4 and Xbox One versions in particular look, without the patch, positively glitchy (that street pavement not loading in time when you travel on a vehicle is quite egregious). Hope it gets better with the day one patch, it probably will, but who knows by how much.
The AI is also somewhat a cause of concern, but let's wait to see how many of the civilians standing still as you clobber them to death and enemies infinitely swinging at empty air if you just walk backwards are "occasional fuckups" and what is actual systemic bad design.