ElevationDock 4 comes with a braided Lightning cable that is integrated as well as one-handed operation that ensures the dock stays where it is when the iPhone or iPad is removed with just one hand.
The physical keyboard of the iPad Keyboard Dock is for sure much faster and more comfortable for creating long documents than the onscreen virtual one. The biggest problem with both the iPad Keyboard Dock, and the regular Dock is that it is designed in a way that forces you to attach the iPad in portrait mode.