I did have a learning curve because I had to create something out-of-the-box. So what I learned:
Make sure your images are equal in height. I wanted smaller images for the default, medium for the active and larger for the hover. I ended up putting all my images on a transparent background with the images aligned on the top.
And, be sure to save your Menu after each change, don't wait to save your Menu after making changes to each Menu Item.
Very nice. Saves one a lot of coding! Thank you...