Seriously 9/10 rating is way off the charts when it comes to recommending it to others who are yet to play such. Trying to convince someone with such rating would certainly seem to be blown out of proportion in my own opinion. Personally, should I be tried to lure into the game with such rating recommendations, I might be very skeptical about it because that would seem to be too good to be true.
Leaving the rating between 6-8/10 is very rational to my understanding, and it will definitely look truthful to anyone whom you are trying to bring into the game on the reality of its content and texture and in graphics and background sound tracks as well.