Interesting. As far as multi sig setups go, this seems like a sane setup for most people. Good gift for your less technically adept family relatives.
I've really never liked multi sig. Makes sense for some people/organizations but not for everyday folks. This seems to take most of the potential pain points out of using multi sig however.
Not a solution for the truly paranoid, as two of three keys are on Internet connected devices. But it's still much more secure than your fiat bank account likely is.