I had an issue with my car where a number of the electrical items went out on my car at once after a battery change out. I took the car to my dealer, they gave me an estimate of $189 for a "diagnostic". I went to Comb's after reading the Yelp reviews, and they narrowed the issue down to 2 fuses that had blown when the battery was reconnected. $90 and I was done. I was afraid he might come back with a laundry list of "sensors" or electrical parts that would need to be replaced. They were very honest and showed me some additional care items that will need to be addressed in the near future (real items that I already knew about, not stuff they made up), and gave an estimate for those repairs, but with no pressure to do anything at the time.
Overall a great experience, I'll be back there again next week with my wife's car. She needs a new headlight.