This brush is my absolute without a doubt go to for most of my liquid and cream foundations. For someone with a petite structure, the brush is easy to handle and is small enough to fit into the contours of my (inevitably tiny) face, while at the same time providing enough size to apply my product relatively quickly and effortlessly. It is dense enough to grab products and apply evenly, but not too dense that it is impossible to clean. Being a synthetic brush, I find it a lot less worry-some in the cleaning up department as well due to the fact that due to the synthetic fibres it dries quickly and evenly without any shedding. I also enjoy the fact that this brush is fantastic for its price point, and due to the fact that it is a relatively inexpensive brush (compared to MAC, MUFE etc) I can buy multiples and not break the bank by doing so.
I have quite a few really great RT brushes so it would be hard for me to choose one that is my favourite but at least when it comes to applying foundation, I think the Expert Face Brush is "it". This brush does such an amazing job and is every bit as good as brushes I have that cost 3 or 4 times as much. Samantha Chapman has created some great products and shown many of us that you actually don't need to pay a lot to get a great foundation brush.