Review (2/5): Convenient
8/24/21 Update: So I've applied it this weekend and it does stay on for a couple hours but doesn't last all day and with that being said I highly doubt it's waterproof. It wasn't on long enough for me to try it. I've tried different stencils and the shapes suck. I gave 2 stars instead of one because it still is better than just using a brush, but still have to fix the end with a brush.
8/17/21 -It's very convenient but the shape of the stencils sucked. None of them have an actual pointy end, they're all rounded. I only tried one brow but I will updated after the weekend to see if the waterproof part actually works