The longer I've had the ProKits, the more dis-satisfied I am with them. They only lowered the car about 0.5"; and the better I get at pushing the suspension to the limit, the less able they seem to control body roll.
They're paired with KYB AGX's and Whiteline adj'ble sway bars (which are both great)
Next time around, I'm going with stiffer, ride/height adj'ble coilovers.