I'm in Orlando, FL for a business trip. Avis was kind enough to upgrade me to an Infiniti M37 for my rental car. A few months ago, I would have been thoroughly impressed with this car and would have thoroughly enjoyed this ride. Now, however, after three short months of Model S ownership, all I could think while driving it was, "What a piece of junk!" While there were a couple of nice features that I'd enjoy having in my MS (seat coolers in Orlando = heaven, and the please-Elon-give-me-this-in-the-next-software-update reverse camera backup lines), overall this car was simply a mess. The accelerator was alternately too touchy and too mushy - impossible to smoothly drive the car even after a couple of days' driving. The brakes were similarly mushy - the wonderful feeling of controlled stopping was simply not there. The navigation system was one of the most confusing, addled thing I've ever seen. After experiencing this mess of a user interface, I can't believe that anyone complains about the Model S system at all. Granted there are some additional features I'd love to have in the MS Nav, but the simple, clean, easy interface simply blows this Infiniti system (and my previous Honda's nav) away. And now that I've experienced the glory of searching for a location via Google Maps, everything else seems like stone-age tech. And the buttons! Buttons, buttons, buttons everywhere, covering every available surface. Talk about distracted driving! I was far more distracted trying to find the correct stupid buttons on the panel while driving than I've ever been by my Model S' touchscreen. I was just absolutely amazed. Not long ago this would have been one of the nicest cars I'd ever driven. Now, I couldn't wait to turn it in knowing how much better the driving experience can be. My wife called me a car snob when I told her this. I guess she's right, but I can't argue. My Model S has spoiled me - there's simply no going back now.