I owned AWM for a while. Never used it in the plane though. My primary purpose was to use it when driving. A friend of mine really touted the virtues of AWM and all it's capabilities, so I ended up buying all the aviation stuff just for the hecht of it. I loaded it all on a Dell Axiom.
When the system worked, it worked great. Unfortunately, I made the mistake of buying a bluetooth GPS. For some reason, it would not keep the link and I would find myself having to go through the whole discovery process over and over. Not a good thing to be doing while careening down the road (or in an airplane).
The Axiom and GPS were given to several supposedly knowledgable people, but no one could explain why the bluetooth connection would fail and why it had to be totally recreated before it would work again. I finally got fed up with the whole thing and sold the kit and kaboodle on E-bay. I bought a Garmin Nuvi 350 instead and love it. It's not for aviation use, but that's not why I wanted it in the first place.
If I had gotten a wired GPS, I would probably still be using it and loving it, maybe even using it in the airplane. My advice, is to stay away from the bluetooth GPS. The big advantage to AWM over Garmin is the upgrade potential. When Garmin comes out with an upgrade, you're going to pay a few thousand for a new unit. When AWM comes out with an upgrade, at most you'll pay a few hundred.