I bought my iFly just over two months ago and have flown with it on several cross-country flights.  I am very pleased with how it performs and believe it was money well spent.
When I updated to version 5.07, I was testing the new features at home and the GPS locked up.  The screen became unresponsive to any commands.  Unplugging it and plugging it back in restored functionality.
I flew with the updated software today for the first time.  I turned the unit on, set a destination (touched the airport, selected "fly direct") and took off.  A few minutes later, because of a change in circumstances, I decided to set a different destination.  I touched my intended destination and the context-sensitive menu came up.  The iFly froze at this point.  Removing and restoring power took care of the issue.
I realize that correlation does not equal cause and that I am a relatively new user, but this has happened to me twice since upgrading to 5.07.  Both times, the iFly locked up after a very small number of inputs.  Has anyone else seen this?
-- Chris