I have the habit of investigating a product's "doube agent" abilities, and I am usually rewarded.
In the present case, it's Laura Mercier's Mineral Primer powder. The other day, I was in a hurry (something I HATE therefore, I usually try to avoid) and I dipped into my drawer looking for my MUFE's HD powder. When I realized I had the wrong jar, I decided to go ahead and use it anyway. I was surprised at the very natural and pretty finish I got with this product. It honestly looked like I had no powder at all. Much better even than MUFE's. It got rid of the shinies, but did not look powdery AT ALL.
I also used it under powder fdt. (any) and before retouching my face with regular powder. And was happy on both occasions.
Now this is the only thing I use to set fdt. I hope to goodness they won't discontinue it, as it usually happens whenever I fall in love with a product (crosses fingers).