The ones to avoid are Dallas Dodge, Rockwall Dodge, Grapevine Dodge and anything owned by Clay Cooley. I have had decent luck with AutoNation Dodge in Keller and Dodge City in McKinney for car purchases. All of the service departments in DFW for the most part are horrible. The nicest and cleanest seem to be Frisco Dodge and Ray Huffines Dodge in Plano, but in regards to the actual repairs it is still a roll of the dice. Good luck and drinking several margaritas in advance makes the experience more enjoyable.