Initially, the game may seem unfinished and did not justify its long development time, but this first impression is deceptive. When you reach lvl 15 first issued 30+ cars in the garage, huge sums for the tuning of his vintage cars, etc., one is again caught by GT fever. The races are becoming more demanding and their own motivation increases. One tries with minimal settings of his vehicle, the last of rauszukitzeln Performance and leans back easier when you finally crossed after 7 attempts by a margin of 0.235 seconds as the the finish line.
In short, the game offers everything would offer a Gran Turismo and should.
Of course there is still reason to complain. Some routes may seem a bit too dull and too colorful to really realistic rüberzukommen. The shadows of the trees and cars are too edgy. The AI behaves rather like a "Destruction Derby", as in a race with highly-tuned luxury cars. The damage model has a lot of room for improvement. (Although I would like to point out that the standard vehicles certainly have a damage model! My Dodge RAM looked after a race time rather worse for wear from ^^)
But with the bad points, most people forget the good things in the game and give a poor rating from pure initial disappointment. And because the developers have not kept all that they promised. But we know from most politicians, so I think you can ignore it.
The game is not bad. Take a little time and you will see the same if you are over your initial frustration away.