I have tested it on the track today (5packs). I would have to say this is the most balance car that I have ever driven. It is very stable on the straights and going in to corners. Going out on tight corners it had a bit under steer. I may need to adjust the setting (shock springs first)the other time(I needed to go for dinner...). In general, I would give it a score of 90! This kit has a huge advantage over the stock chassis. Highly recommend!