I have the AWmap system. It's great when it works, and the screen is
plenty large for flight (though too small IMO for approach plates), but
I wouldn't bet my life on its reliability. Right now I'm trying to
fiddle my way through a software upgrade which has caused my weather to
disappear. They do have an XP version that you can run on their Raven
system or a Windows display unit, but that's a lot of bulk in a
cockpit. Once you get it running, it stays stable for the flight,
though the pressure-fit 12VDC connections are not entirely robust with
all the vibration inherent in light plane design. Some people
semi-permanently install the wiring, but that means you either have to
have duplicate wires at home or do all your trouble-shooting in the
airplane.