We recently took the first trip with our new iFly, Wichita Falls to Port Aransas. Nice system. The only problem we had was the GPS lost lock near Austin, both going out and coming back. I suspect it was because I had it mounted by the mag compass, and the compensating magnets provided just enough interference to drop the satellites as we entered the Austin wierdness bubble. The WSMR GPS jamming notam was active, as well, but we should've been outside that. My Brand L handheld kept track, but it wasn't by the compass and it did have reduced signal strength. I've bought an external antenna and expect no further issues.
The TFR feature was a real lifesaver flying over the Possum Kingdom fires.