As for writing (late May, 2016), the Apple Pencil support still feels like it for a generic stylus with some decent palm rejection. That is to say - slow! But the interface is really nice, the notebook concept/design is great, and the ability to throw in pages from basically anywhere has kept me coming back. Really hope they can bring Pencil speed to notes or at least Notability levels soon!
mpellenberger about Whink Notes, v2.8