At MRT they do a good job but it doesn't hurt to be their friend instead of their foe.
I had a bad trailer in JCY the other day and they fixed everything quickly and with a smile.
I've had the very good and the very bad in DAL, total extremes in their competance and their caring.
I've had some poor to bad experiences in ATL, HAR and IND. Always get a laugh when I fuel in HAR and walk down the hall to use the bathroom and see all of the mechanics awards. There's one guy in ATL that it was fun to watch when he had a problem. It wouldn't take long for the cuss words and the throwing of parts, tools, and the droplight.
Always good in Memphis, LAS and RTO.