Yep. The UX is convenient and smooth. Although it’s not the best product for the most paranoid cypherpunk.
“In our solution, we’ll have three keys: one in the hardware wallet, one in the mobile application, and one in Square’s servers, protected by the same world-class security we bring to the rest of our ecosystem. We’ll require two of those three keys to authorize any transaction; importantly, we’ll only use Square’s key to authorize transactions requested by the customer if either their hardware wallet is used or if the transaction amount is below a customer-configured spending limit.”