Just wanted to share my story about our first supercharge experience and road trip in our Model X on Memorial Day. Background information of our car: 90D, 20" wheels, active spoiler, 1000 miles on odometer and range mode on. Temps around 88F under sunny skies when leaving GA. We drove from our home in the Atlanta area to Charleston, South Carolina today. We supercharged in Greenville, South Carolina and allowed for the entire 65 minutes needed to go from our 100 estimated miles when we arrived to what topped out at 262 miles when supercharging completed. I was at 90% when departing Atlanta (estimated 240 miles range) we drove 128 miles to Greenvile and arrived with an estimated 100 miles of remaining range. Only a 12 mile difference than initially estimated. We auto pioleted 95% of the way and speed was set to 77 mph so I thought it was extremely efficient. We averaged 335 wh/mile for this initial jaunt. The Greenville supercharger is within walking distance of Whole Foods, Chipotle and REI so 1 hr of charging time even with two kids under 4 years old was easy to kill. Ended up with some goodies too at REI in the process. Now here's where it got very interesting. After charging full to 262 miles in Greenville our Charleston destination remained 220 miles away. 42 miles of estimated buffer is a little too close for comfort for me but knowing the weather was going to mostly cooperate, the temps were toasty and we would go 1000' down in elevation en route I was confident we would make it (if not we could go to the Santee Supercharger although it is a good bit out of the way). I set autopilot in motion and kept speed at 65 mph, what I've read here to be the sweet spot for X efficiency. Check out the stats below of what I was able attain. Important to note the last 60 miles of our trip ended up being in moderate to heavy Tropical Depression Bonnie rains. Our Wh/mile managed to drop down to around 315. I also followed our trip meter total energy tab to see how many miles both 85 kwh and 90 kw hours provided under my above mentioned conditions from Atlanta to Charleston. At 85 kWh of usage I had driven 270 miles while 90kwh of usage rendered ~290 miles of actual driving. To sum it all up. I was estimated 262 miles of range, I drove 220 actual miles and arrived with 48 miles remaining. I think the 90X on 20" wheels can easily get 270 miles if kept between 65-70 mph under ideal weather conditions (elevation permitting). Going 65 in a 70 mph speed limit was really a not a big deal for me today as being a holiday weekend there were dozens of cops hiding everywhere the entire route and it was 1 less thing to worry about. Hope you find this info useful! PS....I'm very very glad I got the 90D over the 70(5)D and auto pilot performed heavenly. Cannot begin to describe how I feel about this amazing technology. I was telling my wife the auto pilot alone is worth the 6 figure price point!