I have used the card stock, and the 4x6 66lb Polar Pearl Metallic paper. This is just unbelievable paper. My images pop, and have depth. They look so sharp. I have moved on to get the 9x13 to see what I can do with this stuff. In my area, money is tight for luxuries like fine art. This paper really looks professional, and the quality is unmatched. This helps to keep my bottom line price affordable, and my customers get a quality print to show and enjoy for a lifetime.