[figers]

I have a model X and I would say while I am driving on the highway in the middle lane I have felt 100% comfortable with auto-pilot and never had to take over. I have driven from Boston to Hilton Head where the car did 90% of the driving and it was amazingly relaxing, literally the reason I bought the car...

There have been a couple situations where I had to take over quickly, but they were in places where I know it might not work out so I was extra attentive. One was a on a interchange between two highways and was a really really tight turn, so I am seeing how well it will do, but also keeping my hand on the stearing wheel ready to take over any second (only tried it once). Another is when passing a city on a highway (NYC, DC, etc) I find that there is always more traffic / crazy drivers / construction / tighter turns so I stay alert and hold the steering wheel ready to take over till I pass the city.

I always set the 7 car buffer in the adaptive cruise control and have no trouble stopping even if there is stopped traffic ahead on the highway.