I normally get really good service at Discount Tire but a couple times it was a nightmare. They didn't torque down the lug nuts on my front wheels except for the wheel lock. A few days later, I keep hearing this faint knocking sound, almost like my calipers were rattling or I had a bad bearing. Pull on my wheel to see if the bearing would click and it was very obvious the wheel was loose. Tightened it up and complained to the manager. He gave me a card for 30% off my next purchase. Then, for the next year, every time I'd go in for a flat repair or tire rotation/balance, they would break a stud on the driver's front hub (the one that was the loosest from them not tightening my lugs), so after breaking the 3rd one, they went ahead and replaced them all. Next time, the broke a stud on the driver's rear hub.
They replaced all the studs on that one too, and fixed a flat on the passenger front (every time it hails, we end up with roofing nails in the streets), so they had the back end of the car and the passenger side front jacked up, putting all the weight on the driver's front tire that was still on the ground. First time I open my driver's door, the plastic spacer on one of the hinges broke and to top it off, they mounted the front tire inside out, so they had to fix that too.
I've been going to Discount Tire since I was in high school, so that is nearly 30 years now but for an 18 month time span, nothing seemed to go right. NTB is quite a drive for me but there are two Discount Tire stores within 4 miles from my house, making them convenient for flat repair.