This is an ideal addon for stores with clothes and shoes that have products with many options like size and color.
Your visitors do not have to open each product to check the size or color availability. They can check this directly in the product list of the category.
And in the product screen, option info is much easier as you get the same boxes, along with a hover info text box which you can set at your will through Languages Screen.
This Addon is 4.0x compatible