4 stars.
First of all, this product really is great. I also love the fact that it's organic! However, if you have a pretty big make up brush collection, then this product won't last you a long time. I used it for the first time today and it did the job; it really does clean your brushes perfectly. One pump, even half a pump will do the trick, which is what I love about it. So today, I decided to use it and when I looked at the bottle, almost half of it was gone already! (Which was a bummer, but I can't really complain considering I cleaned 28 brushes and 2 beautyblenders). The brushes in the picture aren't even half of my collection. Therefore, this product most likely won't last a long time. Also, I noticed I had this white dry stuff all over my hand afterwards. It did go away after I washed my hands though.
Rating: 4 stars