Diamond Wallet is still work in progress, so no real surprise yet to be honest.

But the initial tester reaction in Japan has been pretty good and we're a bit surprised about how active and consistent people are about stacking small amount of sats by viewing ads.

The other thing is more about Greenlight and Breez SDK. They're really great tools and helping us save a lot of developer time and troubles for building a self-custodial solution.

With that said, Lightning payments on greenlight would still take a long time to go through (20-30 seconds) and there is still a lot of improvement needed for UX that is good enough for casual users. But building a good non-custodial service takes time and we knew this already.