I use Zeus because it works for me every time. However, it is far from ‘instant.’ If I am at a merchant, I have to make sure to open Zeus early so it can get through these first three screenshots on its own, then I have to swipe down on the fourth screenshot (top of the channels tab) until the total inbound/outbound no longer shows zero. Then I’m ready for a successful lightning payment. I just do this before I’m ready to check out.