After approximately 8 hours and 100 miles of driving, camera calibration completed on my AP2 which allowed me to activate the limited feature set that was released for 8.0 2.50.185 on AP2 hardware. I enabled auto steer, and early collision avoidance assist. I was doing cruise control at 65mph and had 3 occasions where a "phantom red car" jumped in front of my dashboard which immediately causes the model x to slow down. Each time I turned off cruise control by hitting the brakes to take back full control. This is very problematic as randomly hard breaking for no reason poses a danger to cars behind me who would not see that behavior coming. Second issue I have found is that adaptive cruise control at the default setting (2) tails a car far too closely. I am estimating it is only 1.5 seconds to hit the car in front of me. I would consider this extreme tailgating. I will likely turn off collision detection for now and increase the following distance and then cautiously monitor the results for following distances and general "sense of safety".