My experience mimic's Edmund's. The US Canned profiles are very good. I built a custom profile using 4096 patches in ProfileMaker Pro, it's better but nothing earth shattering. If money is an object, you could get away with the canned profiles and unless you printed a custom profiled image side by side, few would care. But if you're interested in the last ounce of quality the printer can muster, you want a custom profile. Of course, I didn't compare every canned profile paper combo with custom. For Luster, there's a difference but again, the canned profiles are impressive for canned profiles!