We were using it before they had the ais function this summer. I downloaded the update and the ais worked (also using a Vesper XB). It worked ok for a while but did show icons of vessels that were not there, visually or on radar. Then the program started crashing and rebooting. I had to stop using it. I updated the softeware this month and tried using it but it still randomly crashes and reboots. I am using a iPad Air 1st gen FYI.