Review (3/5): Not worth it!
I am giving this product only 2 stars for couple of reasons:
1) Cheaply designed
2) Mainly works on lighter weight brushes. Heavier brushes tends to slow down the motor even at high speed.
3) Definitely didn't work on flat and small brushes.
4) Rubber brush adapter makes the brush wobbles side ways especially at low speed.
Cons:
1) It comes with rechargable battery
2) The bottom surface of the water cup has various grooves instead of flat surface which is helpful in taking makeup off (look at the picture).
3) Makes the brushes almost dry after cleaning.
4) Comes with wide variety of adapters to fit most brushes.
Since I noticed that I am not getting my brushes deeply cleaned, I ended up returning it and resorting it my hand washing