Insert "crack" joke here

I had to go to Costco the other day, and there just happens to be a Sally Beauty Supply very nearby, so of course I went in.  I was looking for the new China Glaze Crackle Metals, and was very surprised to find all six colors:

These now belong to me.  Yay!

I quickly tested a couple over a mani I was getting ready to remove and the application is very interesting.  When I didn't shake them up first, they applied more like a frosty over-coat and didn't really crackle much.    They worked much better after shaking the bottle vigorously.  When they dry, they look kind of 'meh,' but after applying a top coat, they really sparkle.  The directions say to wait three to five minutes before applying the top coat.

I wasn't really into the solid colored crackles, but these metallic ones really piqued my interest, and I'm glad I got them.  I think they'll be a great mani-extender.  I've already used the purple one to extend my navy blue pedicure and it looks great. Interestingly, they didn't crackle much on some of my tinier toenails, but they really did on the big toes.  It'll be fun to come up with color combinations for these.

What do you think?  Crackles:  yea or nay?