Despite the good screen on the iPAD it's still not bright enough in full sunshine. Another hazard - at least here in Oz - is that iPADs shut down when too hot. This has happened to me a couple of times and, while it's inconvenient, caused no great drama.
I use an articulating mount and have found that if I angle the screen to reduce glare prior to takeoff, it works with my iPad Mini until the sun elevation changes significantly with time. It was also lucky that the best place for the mount directly exposes the unit to an air vent, and for me that has prevented any shut downs.
You can run one IFR and one VFR to keep situational awareness.
Last weekend I was flying with a friend as safety pilot while he flew approaches in his G1000 equipped aircraft. On the sixth approach into the third airport he inadvertently busted Class B airspace (we were VFR for the practice approaches and not cleared into the Bravo at that point). The device that brought this to our attention first was my iPhone running the Terminal Area VFR chart on Foreflight
The good news was that no phone number was furnished upon landing.
