In the current implementation of the widget, when user tries panning or zooming, there are not map tiles transitions. You just see some white squares until the new tiles are rendered. It would provide a better user experience to have some sort of transition in those interactions.
I think this is very important and suprised it does not have more votes. If you look at virtually any other map control out there this is in built as standard. In its current implementation you get a harsh transition and checkerboard effect as tiles load, it looks unfinished and unpolished.