I use a Body Shop brush. The results are amazing and the wear is longer. When I do a party I show ladies on a mirror the difference between a brush, finger, and sponge. Get a mirror and foundation, place foundation on your wrist, and then make three lines down the mirror using your finger, the sponge, and brush. The brush will be a consistent, even application. Fingers just push the makeup to the side and the sponge starts strong but runs out by the end of the stroke. The differences are clear and I always end up selling numerous brushes. You don't have to spend alot, just make sure to get a foundation brush which is flat and full. The kabukis can be great but the application is not as precise.