My view (slightly belated, I fear — but I've only just stumbled across this place , so please forgive me) —
I find the Aivlasoft software indispensable. To be fair, I enjoy the whole flight planning process and I do it in depth, but I like EFB because:
1. No more buying Navigraph charts — EFB generates them and displays them at the correct phase of flight
2. Excellent moving map (with the aircraft shown on the appropriate chart type for the current phase of flight — especially helpful when taxying around an unfamiliar airport in poor vis) comes as part of the package
3.