Review (5/5): Super fast to clean but some attachment is hard to put on!
I was suspicious of this cleaner because all I saw about its function was just to rapidly rotate makeup brushes on a liquid soap that it doesn't provide. But it turns out this machine cleans my brushes so thoroughly and quickly. For only 10 seconds of the highest speed, my brushes turn from orange to white again! I thought I had to use it with some special brush-cleansing soap, but no, just any regular hand soap with water will do the trick. However, the white attachment thing that you need to put on between the machine and the brush collar is REALLY DIFFICULT to put on. Make sure you don't hurt yourself.