I must say this is the most awesome powder made (so far!). I've been using it for almost 2 years and it works great year round, no matter the weather. You really get a lot of powder for the money. I keep the mini one at work for touch ups (and I hardly ever need it), and the large container...
I have oily skin and I have tried pretty much every foundation and powder. I finally stepped up and tried La Prairie. This powder is heaven sent! Cover well w/o looking caked on. I use it over the cellular satin foundation. I also no longer use a primer which has helped w/ staying power....