you gotta be careful of the alignment guys who ONLY swear by the machine. AND the ones who won't test drive before and after.
I had a huge argument with the alignment shop I used.. he had the super duper Hunter that had the video and step by step what to do, thus making it so anybody who could compare a picture could do an alignment.
I had my wife pickup her car after it was done. she called me & said it was so bad the steering wheel was swung 4" from center and it pulled very bad. so I told her to bring it back.
she did and they started to argue with her. she called me starting to cry and I called them and said, they need to test drive the car. so they did. actually they didn't. they brought her home (in their courtesy car) and picked her backup with they finished. it was the same. so I came home took the car over and the sales guy met me outside, asked me to have a seat in the waiting room, took the keys and drove it up the rack himself and watched the tech go through all the motions again.
The car left fixed. they had to swap the to front wheels, which I hate as a tactic, but it's valid.
car was straight after that.
I've never gone back to them.