My problem with this product is the color.
Instead of the deep royal purple I was wxpecting, it turned out to be a light lavender, almost a periwinkle blue.
It's nice and sparkly, though, so I'm keeping it. It may look good over purple-toned lipcolor.
Since I don't have much use for this color, I likely won't buy again.
I can't get enough of the same product in "Diamond," though.
UPDATE: I'm adding a lippie and changing this to a "Will repurchase," because I've discovered that a light, even layer of "Amethyst" over a plummy lipgloss(M.A.C.'s "Bow Belle" lipglass) imparts a beautiful blue-purple shimmer. It's just blue enough to complement purple clothes but not enough so to give the dreaded "oxygen-deprived" look.
I'm glad that I gave this one a second chance. After wearing it a few times, I really do love it. In fact, I'm almost to the point of needing to re-purchase, which I will do without hesitation. This really grew on me! I almost NEVER completely use up a cosmetic product, so the fact that I'm now out of this is a high compliment.