Well long story on that I was...first cut scene and I was like...'this looks a little plasticky'....still awesome in its own right but kind of plasticky and not up to DA I's standards...but then just after you 'race' Ciri I was looking around over Kaer Morhen and my jaw dropped. The environments are certainly amazing.
Combat seems a little finicky so far I do not think I will be able to play how I want to play exactly. And still a lot I do not understand. But I was messing around with Vezemir a lot after the tutorial IDK how long I was at it but I was trying to do different things. I also feel the control scheme is confusing as hell, you have to do a LOT. BUT I think also that maybe I was overthinking things maybe a little bit. I handled the ruffians that acosted me outside the Tavern with relative ease. But then they could be more tutorial stuff.
Yen is a bit of a ****** so far, just did the first cut scene but she did something that I found incredibly off putting.
The cut scenes...well its a bit refreshing being in a game with cutscenes all the time again. They really do help immerse me...in the world a bit.
And finally the lack of control of Geralt during those cutscenes is problematic, I was reaching for my controller a couple of times wanting to says omething yet Geralt opened his big fat mouth...BioWare has spoiled me so much. 
Quick note about the combat I am impressed on how CD Project Red has melded the 'fast' and 'strong' combat styles on console.
I'd suggest doing some research, perhaps on the Wikia online so you have a vague idea of what's going on.
I read the books and played the first game and there were some things that left me scratching my head lol.
Where role playing is concerned, you will probably be a little disappointed. You are forced into a set protagonist after all -- and pretty much just get two choices in everything I.e dialogue and decisions.
On the upside your decisions affect the world as you progress through the game, something you did previously will either bite you on the arse or reward you later on.
You don't really get to dictate how you combat either, but you can character build to a certain degree by dishing out ability points where you prefer them most. I.e I always build up my "fast style" sword fighting skill, as well as igni, quen and that mindfucking ability which I've forgotten the name of.
I didn't bother with crossbow because I found it useless most of the time.