Actually I have been using Tesla Auto pilot extensively from Seattle > LA > Vegas > SF > Seattle > Vancouver BC twice and it turns out to be very safe. There were situation where certain road condition that Tesla Auto pilot doesn't know what to do, hence you must have you eyes open and be ready to engage in any moment. But so far no major issue and is much more easier/relax traveling long distance....Enjoy!
Tesla P85D Autopilot V7.0 - What happens when you activate auto lane change right next to a semi?
https://www.youtube.com/watch?v=Oiqo1A-nVSU
Furious S8 - Tesla P85D Autopilot V7 - Auto Lane Change
https://www.youtube.com/watch?v=VKy-NzgfekE
Tesla Autopilot V7.0 - Auto Parking in 30 seconds at Vancouver BC
https://www.youtube.com/watch?v=vKTwZQYxt64
Tesla Autopilot V7.0 FAILED - Lost Track @ :15 in Vancouver BC
https://www.youtube.com/watch?v=JGkQzWfbW3s
Tesla P85D Testing Autopilot V7 @ Night
https://www.youtube.com/watch?v=f0qBp_CDPec
Tesla P85D Insane Mode with version 7 and Max Battery Power Ready
https://www.youtube.com/watch?v=GtUfrFUqeBo