The one gripe I have with it is that if and when Block goes under, you gotta sweep to another wallet because now:

1. You are in a 2 of 2

2. It is unlikely that the app/account will transfer to a new phone anymore

3. Social recovery is non-existant as it actually relies on Block servers to work (for some unexplained reason)

4. The only thing left is your recovery kit and you better use it before you lose any of your keys now.

I can't call this long term for that reason.