I moved to the area about a year ago, and I decided to do my summer to winter tire changes here for both of my cars.
At end of March I had my summer tires placed on the car and I noticed that the tire pressure would be low in the front right every two weeks. So I check for nails and other things possibly being stuck in the tire, but couldn't find anything. So I figure when they mounted it that it didn't seal properly so I took it back to Sears.
Upon visiting they said it was most likely a nail to which I told them i checked it multiple times and didn't find one. So after finishing with a couple cars in front of me they took it to the alignment rack in the back (instead of the front tire racks). They jacked up the car and then shot a nail right through the tire. I couldn't believe what I saw. He pulled the tire off to show me the nail and I immediately told him I saw him shoot a nail through it which he contested. Another mechanic came over and said "either we can plug it for $30 or I'll put it back on and you can go somewhere else". At this point you could see the air bubbling out from the nail so I knew they had to plug it.
I told the manager that the mechanic put the nail through my tire and they were scamming me. He said he didn't believe me and charged me a little over $20 for the plug. Now the W rated tires can barely go over 100MPH (No more track days on these) for a company to make a few extra dollars.
I would strongly recommend for any looking to have their car serviced to avoid this auto center regardless of the price they quote you. They will find a reason to charge more whether they have to create the problem themselves.