I just added the app and subscription to my Samsung phone as a backup for my 720. (I think it was just $20 to add the phone for a year.) Works well on the phone and updates fast. It's easier to flight plan on the phone since you don't need to be connected to power, as with the 720, and nexrad seems to update automatically.
Wind direction and speed are now shown in the profile view of the flight plan which is also very nice. The depictions of airmets and sigmets are also helpful.
Tuesday I flew a bunch of approaches with my instructor. He said, "You don't have any excuse for ever getting lost in this plane." I had to agree.
John