Pretty unfriendly- They seem like they just want to get rid of you.
I called about getting the tires on a brand new RAV with nitrogen in the tires and the acted like it was no big deal and that they would just pump them up with ordinary air. When I took it in (It's about fifty miles), I think that they used air rather than nitrogen and told me it was nitrogen. Pretty much lost my trust! When the free service ends, I will either do it myself or find someone who I can trust with my vehicle.