Have any of you ever used the Prestone coolant system flush kit? It is time for the wife's car to have a coolant flush, and considering "quick lube" and dealer prices, I picked one of these kits up at the auto parts store. I haven't installed it yet, but it seems it would make the whole process easier and yield the same results. It would also allow me to fill the system with distilled water, instead of the tap that the service places use, and insure that the car is running so the the heater core is properly flushed. I was just wondering if anyone had any personal experience with this type of item. Thanks for any info!