Me also. She lightly dipped the sponge in the powder, patted the excess off onto her hand and then applied it carefully to my face by slowly pressing and rolling it almost onto my skin. This way, she didn't disturb my base and it set it perfectly.
On occasion, i will use a powder brush also. It depends on how much time i have, and my mood really. I do like using a sponge, but it does take slightly longer.
Instead of using a powder brush to dust off any excess, if i feel the need, i will use a fan brush. It has a much gentler touch and seems to skim lightly over my makeup. Not a necessity at all, but i like it!