Review (4/5): it works great. It has high-quality silicone inserts for your brushes ...
This works so well! I actually use it to hold my brushes right-side up and then when I clean them I flip them over. It's a little wobbly but besides that, it works great. It has high-quality silicone inserts for your brushes to go through (shown in their picture). Much higher quality than I expected!