Well let's start off with this. I own a 2013 Cadillac ATS that needed to get its Driver Assistance Serviced. Like any other dealer, Sullivan charges a flat rate of $105 to even look if there's a problem with the vehicle (if they find an issue, $105 will go towards resolving the issue). While I was there, I asked Chuck (I believe that's his name) if he could also realign my headlights since it should be an easy thing to do and patch up a leak in my rear left tire since it kept losing air. He said yea they can do it.
Well an hour passes and Chuck calls me to tell me he's diagnosed the issue. It would cost $600+ to fix the issue. Personally I'm not surprised it would cost this much since I knew a Cadillac would be costly to maintain. But what angered me was the fact he said, and I quote, "we can't readjust your headlights since ATS's have intelligent beams that realign themselves every time you start your car." So I said basically your telling me it's impossible to readjust/realign your headlights. Seems like a silly manufacturing decision on Cadillac wouldn't you think? He said yes it is impossible. So I said ok, were you able to find the leak in my left rear tire? He said no. "Our technicians ran it through a program and put it in a dunk test and didn't find ANY leaks." Now I know that's impossible because I constantly lose around 6PSI every night after I park outside and get into the car next morning.
Because of their poor performance, there was no way I was going to cough up $600+ dollars to get ANYTHING serviced. I told them it's fine and that's how I basically wasted $105 on nothing.
The next day, my friend recommended me to see Midas and told me they do small adjustments and check ups for free. So I went to Midas and explained the situation. I wanted to get my headlights realigned and I wanted to patch up whatever is causing my left rear tire to lose air. They took 5 minutes and readjusted my headlights for free. Next they took 15 minutes and figured out there was an issue with my left rear valve stem. I asked them how did they adjust my headlights since I thought it was impossible to realign. The mechanic told me, "don't be ridiculous, Cadillac would never make a car that's lights can't be manually readjusted." Also he pointed out there's a specific portion of the Owners Manual that tells you how to manually readjust your lights!
Moral of the story, don't shy away from stores such as Midas and think higher end stores like Sullivan are more qualified to fix your vehicle. In my case, either Sullivan is completely under-qualified or unbelievably lazy to even check if there's an issue. Consider me a loyal member of Midas.