I received mine about a week ago but I haven't had a chance to fly with
it yet, so I was interested to read about it's performance in-flight.
Interesting how when it's turned on, the arrays inside the unit whirl
and revolve, obviously to point the directional antennas in as many
directions as possible to detect interrogations. According to Zaon's
website, they are going to release a panel installation. I'm sure this
will require external antennas. They'll give the unit a better view of
threats behind your metal aircraft.

Also included are interface options to output traffic data via RS-232
to AnywhereMap or True Flight.

The True Flight system is a seperate display which shows higher
resolution quadrant direction, has flight path tracking, altitude trend
and a transponder altitude monitor.

http://www.aviationsafety.com/traffic_alert1.htm

I am amazed at the tiny size of the unit, it's smaller overall than the
previous model VRX even with the antenna enclosure on top. It is, as
you say, a better alternative to Mode S. Also ADS-B Out will only
provide more traffic information to ATC. Fully operational ADS-B In,
when implemented would obviously provide the highest level of traffic
awareness to the pilot.

The XRX provides a lot of this information right now for a fraction of
the cost of TCAS and current implementations of ADS-B.