I looked at the Radenna and NavWorx receivers at Oshkosh. The NavWorx was nicer looking and I think less expensive but I bought the Radenna.
The Radenna receiver will pass traffic information and the NavWorx won't. I understand the limitations of traffic in a plane with no ADS-B out but wanted the capability anyways. And some day (before 2020) the plane may have an ADS-B out on 1090 which should give us full traffic.
Yesterday we tried the Radenna receiver with their application running on an iPad. We had scattered rain and thunderstorms in the area and we could look out the window and see the weather and look at the iPad and see the cells.
The plane has one power jack. I use an inexpensive splitter. The jack is 28V so I'm going to need a converter to use the iFly battery. Converters are available for $30.
An iFly, ADS-B receiver, and IFR charts from Adventure Pilot costs a whole lot less than a Garmin with XM weather and a subscription
I'm looking forward to the iFly update.