Above & Below: Fairy Dust Pink is my favorite of the two I have. It's a light violet pink shade mixed with enough silver that contrasts nicely together, giving a strong holographic pattern.
Below: Copper Cauldron is more of dirty peach shade in darker lighting and a somewhat pink/lavender shade in brighter lighting. I never seem to see much copper in this shade when I wear it and the holo isn't as strong as I'd like it to be.
Sally Hansen has been quite innovative over the years, and this line was ahead of any others that I can recall when it comes to a line of true holographic polishes. I don't recall when these came out--I want to say 2002 or so, but that's purely a guess. They are now discontinued, but a quick Google search shows they are still fairly easy to find and the pricing starts at about $5 to $6 a bottle.
I find they get less streaks in them if you shake them up quite a bit during the application, but they don't give me the even coverage that OPI and Nfu do with fewer coats. I love the holographic color bands on the bottles and I think Sally should figure out a way to incorporate that look into a nail polish.
Do you have any polishes from this line? How do you think they compare to OPI Designer Series and Nfu holographic polishes?