Review (2/5): Meh.  Great idea. but more work for less results
This is a great idea , but it it is honestly more work (by a little) to assemble and find the right size piece and put together to spin in the bowl, then to just get out a brush scrub mat and some brush cleaner and scrub the brush on a mat. And it really does not get all the makeup out of the brush just spinning in the bowl. If it maybe had a scrub mat at the bottom of the bowl to spin on it might be more effective.