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, 6MT, dealer-installed PPK - Euro Delivery 5/11/2011
'05 Lotus Elise (Arctic Silver) Sport, HT, Stage II, Odyssey PC925, Lotus Cup 240R Wheels
'87 Nissan Pickup (Burgandy) King Cab, 90k miles
'13 Audi A3 TDI (Ibis White) Cold Weather Package, Bluetooth - Wife's car - Delivery 9/12