After playing the game for a bit, I noticed a few issues with it. First of all, when a race starts, the car seems to get stuck and stutter a lot, and the other cars zoom way ahead of me. This was fine until it got to the point that I don't even see the other racers until right before the finish line, web if I am doing pretty well until then. Another issue is that the NOS does not help you to accelerate out of corners, it only adds a few mph to your speed. It only seems to work when you are already almost at tops speed. It would also be nice if you could control how long you wanted to use the NOS for in case you don't just want a short burst. Another issue is that sometimes when the car is going uphill, it has even more trouble at getting to top speed and runs very slow. That being said, I love the customization, and the overall mechanics are good. Upgrading performance seems to make minimal improvements to the car however. Despite all the issues mentioned above, I gave this game 4 stars because it is still very fun, and has lots of potential.