I used to hit them up as an absolute last resort. We went on the power tour last year, Dad's c10s power steering pump died in Bristol. Only place in town with a pump was AZ, we drove across town in my car, bought a pump, a drain pan, fluid, rags, torx bits since his pump was held on with them and I didn't pack any, and a pulley puller even though I have 3, they were in Fayetteville (work, home garage and tool kit for trail rig after a shitty Harlan trip). The pulley tool was so crappy I had to shim it with electric tape and a rag to get it to work the ring was so loose, and the threads galled but I did get the pulley off.
When we got home a week later I went to the AZ near my work, who's commercial guys had been begging for us to call on a regular basis. I asked if I could return the puller and get my money back since it broke and I already had 3. They said no, tools can only be returned to original store, I guess like a rental deal. I explained it was useless broken junk and showed the stripped threads. No deal. I asked if I could at least swap for another so it could be used as a backup then. Sure he said just go to the original store. I flipped out. Said I refuse to drive 5 f'n hours one f'n way to return a g.d. $17 tool. I told my boss and he sent the commercial rep packing the next time they showed up with promotional flyers. So they lost a good commercial account over it too. Screw that place, like someone said above, if AZ is the only place in town bwith the part it just won't get fixed today.