I'm picky as heck. I hate destroying expensive tires.
I cranked my dmax just a little to keep it from rubbing when I put new wheels on, it drove to town fine, but when you looked at it from the front the rf was way out on top, that's the only reason I brought it in. When I picked it up they where closed, so I left it cause I was poed. Next they said you have to take it cause it checks out perfect. Drove it strait to Fargo for another alignment.
My dmax was in an accident that bent the rear housing on both sides, after the truck was fixed it went to the Fargo alignment shop because they are also the gm dealer, and it wouldn't start. They checked my rearend 3 times said its fine though again you could see it, and the front of the tires measured .5 in closer than the rear of the tires. To top it off the service manager kept telling me that if the axles where bent the tires would wobble. Idiot. I kept saying NOT in a floating rearend. Yea I had to buy a new rearend, after it went back there after 300 miles and my new tires feathered horribly.
Moral of the rant. Personally I think alignment shops in my area have not a clue what they are doing. I could easily do better with a tape measure.