I prefer to use paper charts. After growing up with MS flight simulator I know one thing for sure: anything with a display on it can and will fail or tell me it has an error of some sort. I will always have paper charts on board... Although I very much appreciated the garmin 100 (hundred) while flying to IFR waypoints somewhere over the Ionian Sea (because there are places on earth where no official charts exist and not even an iPad helps much).