From experience (many windshields in my 850) the OEM is not superior. Just a lot more expensive. It is manufactured by Pilkington who are good, but there is equivalents. In Australia the Australian Autoglass brand is definitely more chip resistant and suffers less erosion pitting (plus 1/4 the cost). Like another re. said, the installation is critical - probably more important than the screen itself. Most dealers sub the install out anyhow so good luck!