Anyone have any experience using them? I was thinking of picking up an ND Grad 3-stop, but still reading around before I buy. Was also thinking of a 3-stop reverse ND Grad as well. I've checked out some of the shots taken with some of their ND Grads and Vari-ND filters on Flickr and I'm so tempted to just buy already. Also wondering if anyone that's used them has found the soft or hard grad more useful for their shooting.