Although I hated Oscar Blandi's Lacca hairspray, I happen to really like this dry shampoo powder.  I find spray dry shampoo to be very messy and the white residue always leaves a grayish cast even on my dark blond hair.  However, I try to wash my color treated hair as little as possible and I can usually get away with two days without using anything but on the 3rd day, dry shampoo comes in very handy.  I very much prefer this form of dry shampoo.  I sprinkle the powder on the roots every 1/2 inch or so from ear to ear and a little bit in the back.  I wait about 20 minutes while I do my makeup, making sure I work the powder into the roots as if it were regular shampoo.  After waiting the required minutes, I brush out whatever residue remains with a 100% boar bristle brush (plastic bristles do not work for this maneuver).  Most of the residue disappears as the oil is absorbed so this dry shampoo doesn't leave a grayish cast at all.  It has a very subtle scent (that dissipates quickly however) and also adds some nice volume that lasts all day and can be easily reinflated with a fluff of the fingers.  It definitely makes my hair feel cleaner and when I use it, I can wear my hair down an extra day.  This powder also washes out easily, leaving no residue whatsoever.  Yes, this product is rather expensive.  I get the 2.5 ounce size and it does last for a couple of months, even though I use it a couple of times a week.  It takes very little powder to do the job so the small size is somewhat deceptive. Amazon has the 1 ounce size of Pronto, which is like a trial or travel size and if you're looking for a really good dry shampoo product, I urge you to give it a try.