In the comments, Nichole asked if I preferred the Heat & Stick powder with Dazzling Diamonds technique over just embossing with Hologram Highlights or Iridescent Ice embossing powder. I figured I would reply here so everyone could hear.
My answer is of course, it depends! I think that Heat & Stick with Dazzling Diamonds is sparklier and more glittery than embossing with Iridescent Ice. However it is also twice the work & clean-up so that is a factor as well.
For my last two Snow Burst cards, I chose heat & stick because I wanted them to really sparkle. I mostly use Iridescent Ice embossing powder for the Dazzling Diamond Dust technique or if I'm feeling lazy. ;)
Anyway, that's just my two cents.