I've used Pivot blue on my previous ride. The bigger improvement it brings is it actually extends your car battery life. With Raizin Blue, My default car battery lasted nearly 3 years before I changed to a new car battery - I think that's quite impressive. The other noticible improvement is to your car audio and interior car lights. There's also slight improvement to the car idling if you have the ground kit installed as well.

I feel it does not improve fuel economy or add any engine power. But coupled with the Raizin spark earth, you will feel an improvement to the car response such as slightly better engine torque, acceleration and braking.