I had ES and GX car batteries replaced in July 2011 with Die Hard Platinum. Yesterday GX's battery died and replaced that with Die Hard Gold for $150. Received a prorated refund of $73 on Platinum. They also have $50 rebate going on, so my net cost would be $27. Can't complain the timing of dead battery .

ES's platinum is still holding good. Interestingly, GX is garage parked both at home and work where as ES is parked outside. However on ES, I use this battery cover : . Whether that has any positive impact or not I am not sure.

Just thought of sharing my experience here...........