Reporter Amy Wilson visits One Sonic-One Experience in Charlotte CHARLOTTE, N.C. -- Some of my past car purchases were chock-full of the annoyances car buyers complain about: long back-and-forth dickering, loads of paperwork and even one condescending lesson in how to fill out the manufacturer's customer satisfaction survey -- top marks across the board, of course. Those prior transactions are a striking contrast to my most recent "purchase," which involved one sales rep, an