The Hourglass Vanish Seamless Foundation Stick in the color Blanc is highly praised by Kevyn in their video review. Kevyn mentions that the formula is great and blendable, even though it is lighter than their skin tone. They note that the foundation seamlessly blends into the skin, creating a natural and no-makeup look. Kevyn also appreciates the product's performance in the under-eye area. While the foundation stick is a bit pricey, Kevyn believes it is worth the investment due to its excellent blending capabilities. Overall, the Hourglass Vanish Seamless Foundation Stick in Blanc receives high praise for its seamless application and natural finish.