I got a rock chip on the passenger side of my windshield just above the center of the wiper blade. I had Safelite repair it, but checked on replacement just as a comparison. They use Pilkington, but it's NOT the German made one that comes in the car - it's manufactured in Mexico, but I think the overall cost was around $5-600 installed. I checked with the dealer, who uses all OEM German-made parts, and they wanted close to $1,500! That was last year, so I'm watching the damage to see if it grows. They did a pretty good job at relieving the stress and stopping the damage from spreading.
'11 BMW 335i (Alpine White) M-Sport, Premium, Heated Seats, HK, Ipod adaptor, dealer-installed PPK - Euro Delivery 5/11/2011
'05 Lotus Elise (Arctic Silver) Sport, HT, Stage II, Odyssey PC925
'87 Nissan Pickup (Burgandy) King Cab, 80k miles
'13 Audi A3 TDI (Ibis White) Cold Weather Package, Bluetooth - Wife's car - Delivery 9/12