.....if the iPad overheated and a subsequent fire started. It was recommended by my FOI that we carry "Lipo-safe" bags and leather gloves in each aircraft to handle and stow the iPad should this occur.
Airlines around the world use the iPad, in this region QANTAS, amongst others, use the product.
CASA Published CAAP 233-1(1) regarding using the iPad as an EFB.
IMO that document is one of the easiest publications to read on the subject. The one by NZ CAA is equally as good.
The product is excellent, just follow the advice issued by the regulator.