I have two EFB's in my aircraft, and I find more useful and practical to load into my Sony Ereader my DEP, ARR and ALT approach plates in pdf format and use it day in day out 99% of the time. It is lighter, no cables hanging around, loooong battery life and fits in my flight case for review in the hotel in case the flight destination is unfamiliar.
It is the place where i keep all my flight manuals, perf tables and all the stuff i can imagine in pdf and other formats, only handicap is that is not backlighted, that would have made it perfect.