I’m mainly just using the built in G-Pen, I love that brush! Getting to grips with the pressure sensitivity is key though. I’m working on an iPad Pro with Apple Pencil and the feel is certainly different depending on the tablet used. I keep the stabilization setting turned up pretty high, to help me get some smooth, clean lines that I like. The thinner flat lines like the T-shirt text are the Milli-Pen marker.