I bought this powder in light and shimmer and love both. These do not oxidize and are perfect neutral shades and should work on cool, warm or neutral undertones. The powder itself is very finely milled and does not cake. It helps control oil and takes away shine. Shimmer adds a nice glow but isn't glittery. The cute shake dispensers are great as well.
I like the way this powder sets my foundation. I will be using this on special occasions so it can last and like all TIGI products it's overpriced. I think I can find something cheaper that does the same job.