I have a Vista HCx. I also have a 'proper' aviation GPS.
My only use for the HCx in an aeroplane is for logging my track, which the other GPS doesn't do.
I wouldn't like to try to use it for any form of navigation.
In my experience the battery life is nothing like 25 hours, more like 15-20.
Last edited by Alan_D; 19th May 2011 at 19:14.