I used Bare Minerals, then Everyday Minerals for a while. I didn't really notice any positive change in my skin. Eventually (with the Bare Minerals) my face would itch and break out in a rash whenever I used it.
Then, I went back to liquid when I started working for Lancome. Liquid just looks so much better on me and it doesn't cause an itchy rash. Now, I will OCCASIONALLY use mmu (NOT Bare Escentuals) as a setting powder whenever I think I need additional coverage. Sometimes, the only thing that covers the redness of a breakout is liquid, concealer, and a dusting of mmu.