Jillian Dempsey for Avon Professional Eye Duo is a GREAT idea -- it combines a shimmery liquid shadow on one end with a coordinating liquid liner on the other. I tried it in White with Jet Black eyeliner.
The shadow applies easily with a sponge doefoot applicator and dries quickly; however, it's not very pigmented and it's really pale--if you have a darker skin tone you might want to go with one of the other three shades. I do like the iridescent quality of it, though, and I may reach for it in the future as a highlighter.