There aren't many makeup products that leave me feeling totally ickified, but Urban Decay's De-Slick Mattifying Powder ($28) is one of them. Everything from the application method to the way it looks and feels on your face is a colossal disaster.
The hard-pressed light lavender (although it claims to be translucent) powder is difficult to get onto your brush, so you are pretty much forced to use the puff that comes inside. The powder feels chalky to the touch and doesn't spread well. In fact, because it's so oil-absorbent, it makes your skin feel dry, almost like it's cracking.
I was really bummed with the results, because I like a mattifier for my T-zone from time to time, and a powder compact in a cute purple case seemed like a great solution. Unfortunately, I'm afraid that unless you are going for a Bride of Dracula, Dita Von Teese, super-matte, pale face look (or if you happen to be someone with extremely oily skin), I'd steer clear of this powder.