I don't typically lease, but I believe there is a time and place. I paid nothing above my payment, insurance, and gas for that car, as the warranty covered issues and Audi covered scheduled maintenance. Even drove to me, dropped off a loaner, and took my car, then brought it back when done. It was convenient, I'll give them that.
That said, had it been a purchase and used outside of the warranty, the convenience would have been gone and I can't even imagine the total cost of repair/maintenance. The M3 may be a good candidate, or maybe not, considering their popularity/demand. I was shopping for that car in January, and they'll give you just about anything post holidays when everyone is sitting around twiddling their thumbs waiting for better weather and consumers to recover from purchase burnout.