Controller navigation of UI

Hi. I want players to be able to use a controller to navigate our game's menus. We use Unity's new UI, and in the EventSystem have specified a controller axis for our vertical axis. However the selection from the controller is extremely sticky. The joystick must be held down for a second in order for it to move its selected item down.

I've tried fooling around with the Gravity, Dead and Sensitivty levels but haven't found anything suitable. Could someone recommend some standard settings so the input is not stick?