It is kind of pricey at $8.00 for 6ml, but for me it is well worth it to make any color an instant holo. I bought mine from http://shop.llarowe.com/
and as I am writing this it's on sale for $7.00.
Here are a few looks I have done with it.
Here it is over OPI's My Private Jet
Here it is over OPI's Vodka & Caviar
As you can see you can use it over any color you want, so when
you look at it that way you are getting a great value!
What is your favorite nail polish?