I'll add to Gary's post because my comments are in the same spirit. I received my iFly during the winter and did not leave the local area much, though I was so impressed with it that I convinced one of my hangar neighbors to buy one as well (and he loves his, too).
In June, my wife and I flew from Rochester, NY to Fort Myers, FL in a Cherokee. Once in Florida, we did a daytrip to Marathon Key. This was a chance for the iFly to really shine. Though I had some issues with lock-ups early on with the iFly, the unit performed flawlessly for 26.3 flight hours and proved itself to be a true asset. I remain very pleased with our purchase. There are a lot of reasons why I like the iFly, but this trip brought out some others:
1. Although there were times when the sunlight fell directly on the screen, (I have a Cherokee with the iFly yoke-mounted), it was always readable. Much more so than the Lowrance 500 I used previously. There may have been times when it washed out a bit, but I could always see the important details.
2. Like Gary, we experienced weather deviations and appreciated the simplicity of reprogramming the GPS quickly and easily. At one point, we deviated to an airport that was not a part of my original flight planning, so the A/FD type information available on the iFly was quite useful.
3. During the cross country, the iFly was great for doing flight planning and "what-if" calculations on the ground when access to a computer was limited. The function that allows you to "fly" the route looking for airspaces is a great feature for double checking the plan.
4. We flew near one presidential TFR (around Miami) and a firefighting TFR over the Okefenokee Swamp. It was wonderful have explicit TFR boundaries depicted right on the iFly.
5. At the end of the trip, we used Walter's pointers on exporting the GPS tracks to "GPS Visualizer" and made some excellent maps of our trip. I like how the iFly organizes each leg into a separate track, nothing more, nothing less (my Lowrance just ran a continuous track until its buffer filled up, which meant that you sometimes got more or less of the track you really wanted).
6. The new vertical speed guidance for hitting pattern altitude is going to make me lazy, it works so well! What a nice tool to have.
Thanks to Walter and everyone else at Adventure Pilot for making this wonderful device available! I can't wait to see what you all come up with next.
-- Chris