Of course Gamespot would give a 6... Of course the comments would be disabled...
I'm 30 hours into the game and it feels like a dream come true, I've been dreaming a game like this for the last 22 years.
The castle, the countryside around it, the atmosphere are all there. The amount of little details tells us that the creators are big fans of the books.
The spells are well designed and always look impressive, the way you can combine them in battle is so fun.
I would recommend to play in the highest difficulty for a harder challenge, especially if you're used to action rpgs. This way you will eventually see and use every gameplay mechanism the game has to offer.
If you are a fan of Rowling's universe, just buy the game now, it's that good.
If not, I would recommend to watch some reviews and Before You Buy videos, or some castle exploration videos and then decide