I bought the AV80R after they had been on sale for a while and I thought they had been about for long enough for any issues to have been either common knowledge or fully sorted. I had previously owned a couple of Skymap II's which had given excellent service for over 10 years. When the AV80R was working I found it very good, both in the air and on the ground. It was easy and intuitive to use and did the job. Unfortunately it contrived to go wrong and three times in two years, each time it was returned and replaced under warranty. The faults were always the hardware but no proper reason was given by the maker/dealer. In the end I lost confidence in the units and the dealer was able to secure a full refund from BK. The refund was spent, in the same dealership, on an Aera 500 which I have used more in the air and less on the ground. Three years on it is still giving excellent service. It feels much more robust and fit for purpose than the AV80R and has proved to be just so.
Rans6......