Hangar added me to the beta list for Autopilot. I finally had a chance to try beta version 4.5.183 on my iPad mini 4 and Spark with latest firmware. I am cautiously optimistic. I did a 12+ minute waypoint mission without crashing and a few follow missions with the Spark in front of me with varying altitudes. I also did a few orbit missions. All were successfully completed without a single crash. Overall I am really happy with the capabilities that Autopilot provides. If the reliability proves out, this would easily become my go to app for flying. I am more interested in arial photography than flying so the added capabilities that Autopilot provides over DJI Go is a huge improvement.