I love this game. I played the original Grid when it came out, Grid 2, and Grid Autosport. They were all great but this is fantastic.
I really like how you don't have to follow the racing line perfectly to win the race, you can brake extremely late and still make the corner if you're skilled.
The liveries are amazing, and you can add them to any car.
The tuning system is great for people that have no idea how to tune a car. Its very simple and straightforward, though I did think Codemasters should have added more options.
Overall, 9/10. I think this a great game and you should try it before jumping to conclusions because someone else hated it.