I've just come back from my first race meeting with the anti-squat mod and wow! what a difference it makes!
On my local track it has transformed the car. My car has gone from fairly quick but very inconsistent to very very quick and much more consistent
One part of our track has always been causing me problems - basically a double jump followed by a 2 tabletops, the latter with a hairpin turn right at the end of it.
Before today, I crashed over this section at least once per race - well today I did 3 heats and 3 Finals without even looking like crashing!
The car was awesome - 3 heat wins and 2 A-Final wins sums up just how good the car was - if only it was this good last month at our state championships.
I would suggest that anybody who is not totally happy with their setup at least give this mod a try.