I didn't like the game first. I was struggling with idiotic AI, and I found the game was way too easy. Took a long break, found a few mods and *badampam tss*, it's awesome!
True To Life AI Season 2013 makes this game unbelievably fun to play, FUSION HD Tires and HD Tracks pack makes it look super cool, and the debugging options give a bit more options in-game.
Sure, the first laps of the races are a bit easy still, but after, it's true racing. Started a career with Marussia (with AI difficulty Legend, 50% races with TTL 50% scaled tyre database), qualified last on first two races but with huge first laps, great tactics and a bit of luck managed to get some points.