The overdrive pulley helps a lot. By slightly driving the front wheels faster than the rear it pulls the car through the corners, the most notable thing for me was how it squares up without trying to loop coming out of lower speed corners and trying to get on the throttle.

For me personally it was a must. No sense in wasting money on the Exotek locker, just glue the clicker and tighten it all the way down. I ran it like that for well over a year without a hiccup.