I disagree.

2 of the 3 keys are controlled by Block (1 in the App, 1 in the server).

That means that block can rug people, if pressured by the government.

Furthermore, all transactions are announced to their server, which means bad bad privacy.

They have optimized a signing device which is supposed to be for savings, for spending.

It's like putting a fridge in a sport car.

A fridge is useful, a sport car is cool, you combine then and you get something ridiculous