At first glance, beauty blenders are expensive. Even on amazon, ONE Beauty Blender cost $13 plus $6 shipping. With just 100 Birchbox points, you basically got two blenders for the price of one.
They will change the way you apply foundation. I was skeptical, I didnt mind my brushes, but they were streaky until I spent a lot of time blending and buffing. Now, with the Beauty Blender, in half the time, you have perfectly blended, smooth, natural skin that melds with your foundation.
It is easy to wash, smooth and long lasting. I have had dupes/knock-offs and while they do better than brushes, this is the Bentley of blenders. Go for the gold and get yourself one (or two!)