But it looks pretty dubious from the perspective of Fitts' law. The items to the left and right are vaguely okay-ish: they're long in the direction of cursor movement, however you need to hit the narrow vertical profile while there's empty space above and below each item. The top and bottom items, though, are narrow in the direction of cursor movement while being far enough from the mouse that the movement will have some speed. It's the same problem as Windows' menus have, only closer to the mouse so not that pronounced.

Meanwhile, in a classical radial menu, the items are closer to the cursor and they should have considerable depth in the dimension of cursor movement if they use icons of non-microscopic size.