I was rear ended a couple of weeks ago in my brand new car. I called up the dealer where I bought the car and they recommended Penske Automotive Collision, which was also certified by my car's manufacturer. Having had a really good experience with the dealer, I took their recommendation and made the appointment.
I dropped the car off on a Wednesday after getting it appraised elsewhere. Even though Penske wasn't an authorized repair shop for my insurance company, they had no problems authorizing the additional repairs needed with the insurance company. The person working with my car, Bill, advised me that it would most likely be the following Weds or Thurs before I got my car back, so I was pleasantly surprised to receive his call on Tuesday letting me know all was done!
The bottom line is that these guys were professional and did a great job, while being very nice and informative every step of the way.