Buying a 2012 Volvo XC60, and saving $3000 off of MSRP.
I used my Wholesale Report as a source of knowledge regarding the dealer price. Because of this report I was able to accurately assess the deal I got. On the one hand one knows whether or not one is getting a good deal [the staff will always claim you did get a good deal - no one will ever tell a customer they got hosed]. On the opposite side I knew exactly what the dealer was capable of regarding the deal so that my expectations weren't unrealistic.