Not sure how white it makes your teeth...
But..it does make them shiny!  I use a regular manual brush since it does stain the brush.  It gets everywhere...so be sure to put hot water in sink before you start.  I end up spitting gray for a bit afterwards, so either rinse with mouthwash or give your teeth a good cleaning with your spinbrush/toothpaste afterwards.  Doesn't taste bad but the grit clings pretty hard in your teeth.
Rating: 4 stars