Fortunately, Lenovo hasn't done anything to skin the interface apart from setting its own wallpaper background and putting
some really useful widgets on the main desktop screen.
So you are free to add shortcuts,
widgets and bookmarks to your heart's content, but Samsung hasn't stuffed it full of
widgets - there is a
useful task manager
widget that will let you dive in and see what apps you have running and quit them, although the
widget isn't
really necessary, as a long press on the home button gives you a modified multi-tasking menu with access to the same task manager as the
widget supports.