The greatest concern with AP is the fallibility of the driver. Although released for highway use, inevitably drivers are using it all over and all kinds of roads, mostly it has to be said incredibly successfully. (surely safer would have been for Tesla to Geofence AP use to sections of highway, at least initially during beta release) However in time somebody at some point will get this wrong, probably sooner rather than later and likely badly so. There exists the tech to monitor eye movements with a camera, (MB/LG as an example) would not this be a whole load safer if this was fitted to Teslas with AP so at least the car could monitor that the driver was observing the road. At the moment the car has no idea if the driver simply fell asleep, or was engrossed in their email/sms/fb/twitter et al. My worry, as I suspect is the same as many here, is that there is major potential for personal tragedies with incorrect use of this technology, and also massive damage to Tesla. This could end up being a case of a trick too far denting the entire BEV evangelism. That said my car, soon to be delivered, has AP and damn am I excited to experience this tech.