Helpful but not a game changer
I tried this out knowing it was a little gimmicky. It does a fantastic job of getting product on the face and spreading it around with practically zero waste. However, as noted in other reviews I have read, it does a terribly job of blending out foundation, etc.  I use this to  put the foundation on my face and then use a blending sponge or round brush to blend my product out. I know there are a few YouTube videos of people using these to blend out their foundation with flawless results, but I am not a make-up wizard - just a normal person. So if you are a normal person, expect normal person results and plan on blending out your foundation with another tool.
Rating: 3 stars