How old/what condition are your tires in? Anything odd about how the tread looks? And what does the alignment printout say that you should have received after payment? (Alignment sheet is always given after an alignment to, well, prove the alignment has been done) There might be a lot of numbers all over the place on it, but the big ones are front toe and front camber. Front camber should be about -0.5 to -1.0, and front toe should be between 0.10 to -0.10. One last thing, is the car physically pulling to the left, or is it driving straight but the steering wheel is just not centered? This can be messed up because the tech has to eyeball the steering wheel straight and then put in a steering wheel holder, and if done sloppily it can end up not being centered even with the alignment done correctly on the computer.