I love the crackle line. And as for it getting clumpy .. you have to roll it over your palm ever so often to loosen it up as you do the rest of your nail polishes. Just hold the bottle upside down and roll in the palm of your hand for a few seconds to keep from getting that gooey clumpiness :)
Contrary to the other review, crackle goes on glossy. It does what it's suppose to! I actually overpaid to get it when it first came out. I liked it until a month later, I tried to use it and the formula turned into a goopy mess. I'm extremely disappointed in this product.