I just got a roll of the metallic silver and I'm none too impressed. The metallic properties are definitely there, but it's really, REALLY dark stuff and I can't find a profile to give me great results on a Canon ipf8300, just "okay" which isn't what I was hoping for.
Regardless, the paper seems like it would be to be better suited to high-contrast and/or black and white images. I'll keep searching for the right profile, but in the meantime I'm sticking with my tried-and-true Lexjet Sunset Metallic.
EDIT: If you'd like, I can print that image and post a photo to show the results on Slickrock Silver 300.