The HC3 exceeds my expectations. It has a lovely sound signature with a midnight black background. I’ve paired it with my iPhone 13 Pro Max and it works flawlessly (which I think the HC2 had some quirks with), and with a FiiO M11 Plus LTD. The Android app is a little redundant, IMHO, but that’s neither here nor there… it’s not necessary to use.
Only used IEMs, and a wide range of sensitivity, with no hiss or noise.
It’s nice to have this dongle for the times I want to leave my DAP home.