I actually bought this product not knowing much about it. I just needed a black ink pad. It turns out that I lucked into something I didn't know I needed. StazOn allows you to stamp clear images like many other products. However, it does not run or smudge like others do. I can chalk, paint, or ink after stamping my image. My lines stay sharp.
I have not yet tried stamping on materials other than paper, but I look forward to doing so.