The Jepp FD on the iPad is great, once tried you never want to go back to paper.
Two issues the regulators will raise, in addition to those mentioned, is 'mounting' and classification.
Mounting an iPad has been a thorny issue for a number of years. Velcro works a treat! However it should be located in a 'viewable' position and not impeded egress. Try fixing it to a chart clipboard already installed by the manufacturer. It works a treat on the bigger ships. On smaller aircraft the iPad mini might fit better.
Classification is tricky because PEDs (iPads) are normally class 1 EFBs, which means they can't be used below 10,000ft.......not much use for an approach or taxi chart! You can get round this by seeing if the Authority would class it as a 2!
However, expect to be required to deactivate 'own ship' position and any GPS function. A small price to pay to get rid of paper Jepps!
GURU on a tablet PC for Perf / Mass and Balance is fine cos its used on the ground pre flight and therefore does not constitute part of the 'EFB'.
The above worked with a non AOC operation.