Well, I've been one month with my 2018 Model S P100D. I look for every excuse to drive it. If my wife says that we are out of sour cream, I'm at the store in 10 minutes. Now I'm trying to figure out what exactly it is about this car that is so different from other cars I've owned. One month ago I was at the Mercedes dealer about to pay cash for a 2018 Merc AMG E63S 4matic. The car was a beautiful, brutal sounding, 600+ HP, insanely fast piece of luxury .... yet, I could sense a guilt developing regarding the gas waste and pollution. So, I decided to test drive a Tesla first. That very day I purchased an inventory car with 700miles. Recently I've been looking at some youtube videos of the AMG E63S 4matic that I didn't buy and mentally comparing it against my SP100D. On most levels there is no comparison; the Merc blows the Tesla away ... in luxury, build quality, customer service, parts availability, reliability (probably),etc. However, I don't have even one regret about going with the Tesla. Why is that ? Is it just because the Tesla is an EV and I'm not polluting every time I hit the accelerator ? There seems to be something else, some intangible quality of the Tesla that I just can't seem to bring to my conscience mind. A quality that I hope will never go away.