Appreciate the comments. I have only used my Ipad while flying to brief approaches and for taxi diagrams. I load approaches into my Chelton, which provides automatic altitude bugs for step down approaches, but you have to enter MDA, etc., manually. Also on the MFD a lot of important data is not available, however with the Ipad you actually can read the plate. Understand Jeppesen is working on an Ipad app, that would allow the use of their plates.
I have not experienced heat or light problems on the screen, probably because I keep it tucked away until I need it. Another great feature, if you have the 3G, version is you can use your favorite internet flight planner, and file online from anywhere. Which is really great on long cross country flights, with fuel, or overnight stops.