My only problem with it was that it was hard to tell when I was progressing that I would cut off side quests which made my game much shorter. Game can be really hard which is nice if you are after a good challenge.
If you were to go into your menu on the game you can highlight the quest you want to do which makes it a little easer to follow.
The story was what pulled me into the Witchers world although at times it can can overly deep,although I found by reading the the biography`s on the places and people in the games menu did and will help you understand a little bit better.
I would have loved the combat mechanics a lot more if they were more like Dark Souls,but again it was just a learning curve and adapting to the change.
I played the game solid for 2 week and have seen 5 different endings to the game,there is loads of gaming devs out there who claim your choices will effect your world but very rarely do we see this happen (Mass Effect III )anyone.
But in the case of the Witcher every play through is different,its like two games in one as you will need to play it twice to get both sides of the tail.
For those of you still thinking about playing this or are waiting to play it then you are truly in for a treat.