Review (4/5): but I find that it gets dirty very quickly
It's very effective at cleaning POWDERY substances off of brushes, but I find that it gets dirty very quickly, and stops working as well. Also, it won't work with any sort of liquid or cream makeup. This definitely shouldn't be used as an alternative to cleaning your brushes regularly, but it's great if you need to use the same brush for different colors in the same day/makeup application.