Since I already had a Nexus 7 I gambled $15 on this Avare/HIZ system. This morning I paid the exorbitant sum of (IIRC) $2.50 for the 'pro' version of the HIZ adsb receiver software.
I put the stuff together and : It. just. works.
As soon as I connected the hardware together and took the stuff outside I was seeing airliners
I installed the current release version of the HIZ, which supports only 1090. So you see lots of airliners. The Avare software is a perfectly usable navigation package.
I signed up for the beta, and just now got the link to the pre-release version that supports 978, I'll try that tomorrow and report back.
Pluses and minuses:
Avare shows traffic as a dot with a velocity vector and altitude on it's map display. I'm pretty sure it will color code targets for you, based on a helicopter that flew nearby, but I'm not sure about that. It doesn't tell you anything about the airplane generating the target.
If you want to know more about a target you call up the HIZ software and it will show you everything it knows about all the targets it is seeing.
The 'good to go' cable would not charge my Nexus 7.
I'd want to dig the magnet out of the little antenna before having near the mag compass on an airplane.
So far my reaction is that if you don't have $500 for a Stratus 1 or similar, nor do you have $200 for a Stratux, then Avare/HIZ will be a real bargain once 978 support is implemented.