My initial reason for having stuck to my deodorant is because it protects my clothing from underarm stains, Black and White.
Having tried Shield MotionSense felt like a breeze, in the truest sense. I often worry about smelling foul during and after exercise and this kept me smelling rather fresh throughout. I love the faint, girly scent. It also left no marks on my clothing, I wear black all the time. It dries very quickly, some aerosol deodorants need to be aired a bit, they can be slightly runny. Shield MotionSense, was like "air" yet effective. I am definitely switching.