I went to Tires Plus roswell because my car was shuddering. I was worried it was the transmission because when I would floor the car the engine would take awhile to catch up. They looked over the car and told me all I needed was a tune up. They replaced plugs, wires, and a coil pack ?, and it runs wonderful. These guys are really nice, and yes salesmen but they cared about my car and when I said no on services they were totally cool. I will come here and recommend it to my friends.