When I used to autocross my subaru, I brought it a specialized alignment shop that really knew their alignment stuff, and calibrated their machine almost bi-weekly.
I brought my 4runner there, and the alignment was AMAZING. But at $200 a pop, and taking it wheeling, that was quite a lot of money. So I opted to go to firestone, for their lifetime alignment. I've been to multiple locations, and I will say firestone is completely a hit or miss. You either get some highschool/College kid who's there just to get a pay check, or get the same kind of kid who's really into cars and knows what their doing.
I've talked to the tech at the firestone I regularly go to now, and he really knows what he's doing. I trust him to do the work every time. I'll admit, the alignment isn't as great as the place I brought my subaru too, as I bet they don't calibrate their alignment machine as often, but it's damn close.