EJM in the states did the trial and the FAA were happy. I haven't seen how the trial was conducted but they did do decompression events at high flight levels to see how it would cope. It obviously coped well.
On the Hawker we run Electronic charts on the MFDs. 2 independent file servers with their own batteries. In the event of a double generator failure, the #1 file server can be accessed independently of the main batteries.
We do not carry paper approach charts.
The weight and space saving alone made the exercise worth while.
A couple of our colleagues run the Jeps app on their own iPad. It does a very good job and would be a much cheaper option than whatever stand alone system you can buy now. In a small cockpit, the biggest hassle is where to put the iPad while you use it.