I would give this a 4 because I'm actually using this brush as a concealing brush, not a foundation brush. Also, I believe that this item from Smashbox is in limited edition because I don't see it on their website anymore. My sister just gave this to me together with the other Smashbox stuffs that she sent to me from USA.
This brush is perfect for me as an undereye concealer brush. The size and the handiness is perfect. It's also easy to control making the concealer faster to apply every morning.
Too bad it's in limited edition, I need to be careful with using it, or else, I will be on search with another similar product to this one.