I have AP1 (17.26.17) on my car. Recently, we spend a night at Half Moon Bay, taking CA-92W, and then HW-1/I-280 back. On the return, I enabled Autopilot throughout the stretch of Hwy 1 from HMB to San Francisco . This is a route with a variety of features - undivided road, rough pavement in places, assorted lane entrances and exits, and lots of curves to negotiate. I did the entire stretch with hand on wheel - that's not a disclaimer, I didn't believe AP could handle the road characteristics without bailing repeatedly. At least, that was my assumption. But I was surprised how well AP1 kept a lock onto the lane. It made it across intersections, slowed for merging traffic and took all the curves with a degree of confidence that surprised me, and only disengaged once. On multiple occasions, the car in front drifted left or right into exit lanes, but AP correctly followed the lane rather than follow the car in front or become confused. It took the winding coastal section near perfectly. I expected pingponging due to over/under compensation. But that didn't happen at all. It was impressive to see it take repeated S curves while centering within the lane correctly. Overall, its perforamnce engendered confidence. AP1 continues to have notable weaknesses, e.g. cresting a hill or bottoming an underpass, especially while driving into sunlight, often causes it to 'go blind' momentarily and disengage. It may lack some originally promised features still (e.g. traffic light identification, which the EyeQ3 hardware can track), but it's still an extremely useful driving assistance platform. It's on for almost all of my significant freeway driving, and during this first hill driving experience in a while, its performance was memorable indeed.