I was at Home Depot today, and saw this stuff on display. It's a tile underlayment similar to Hardi-backer and Fiberock, but looks to be plastic or foam based instead of cement. It's got some flexibility to it, and is available in 1/4" and 1/2" thicknesses. Has anyone tried using it? If so, how was it to work with? I thought about picking up a piece just to experiment with, but I've got enough on my workbench right now, so I figured I'd ask here to see what others' experiences might be.