I've been using Aqua wallet in the wild this week... mainly buying cookies and coffee from the few lightning enabled retailers close to me. My main UX takeaway is that the transaction takes close to a minute to reach [notify] their lighting wallet. This contrasts to using lightning in El Salvador wheretransactions time was generally between 280ms and 5sec, depending on the combination of sending and receiving wallets.
Will definitely pick-up your book - very interested to learn about the under-the-hood augmentation of lightning blended with liquid.
