Flybaby wrote:
I agree with you Don, I do not trust the consumer devices very much and you must remember they do not have the WAAS GPS either. See my comments in the General Tab and Real Plan for the iFly 740.
If you use an external ADSB receiver with your device--iFly, tablet, or laptop--then iFly will preferentially use the GPS location provided by that device. All of the common ADSB receivers these days (including the low-end Stratux) support WAAS. If you're not using an ADSB receiver with iFly, you're losing the traffic and weather data they provide, which is a huge benefit.
For what it's worth, different folks have different experiences with portable devices. When I first started flying with iFly, I had a 700 on ship's power. I realized my mistake only after I suffered a complete loss of ship's power, which took out both my panel GPS and my portable iFly 700. I then bought an external battery for the device, and flew that way for years, upgrading to a 720 along the way.
When iFly became available on tablets, I shifted to that for better screen resolution and a slightly larger size, which made reading approach plates easier for me. I have been flying with two tablets in the cockpit and the 720 in my flight bag for many years with no problems.