I have had my S for about 3 months now with 5,000 fun filled miles. I have not taken any trips outside of the car's range yet where supercharging would have been required, but I have used superchargers 4 or 5 times. Yesterday I had a last minute trip of about 70 miles from NY to the Trenton area in NJ. I had about 160 RMs on the car so I knew I would need to hit a charger on the way back, and I knew there were at least 3 of them on my route. When I got into the car to come back, I had about 80 miles left and I put my home address in. It did not route me through any of the chargers and when I got on the highway I got the warning "stay below 50 MPH to reach destination" despite having to pass 3 chargers. I, of course, manually overrode this and stopped at a charger to pick up 60 or so miles. It seems silly for the car to tell you to drive at a low speed and risk getting stuck in traffic, not making it to your destination, when there are numerous chargers along the route. Is this normal behavior? I thought the purpose of the nav was to eliminate range anxiety, not encourage it.