I took a chance going to an auto repair shop that I was not familiar with. With that said, I'm glad I did. The customer service aspect is really good and Ryan provided a thorough explanation of their findings. I spent more than I had hoped too, but I considered it an investment for my 20 year old truck. They also provided me with a loaner car for the duration. The mechanical issues were resolved and my truck runs much better now. I will continue to use Certified for future needs and would not hesitate to refer my friends! Thank you Certified for your help and great service.