I was super excited to get this because I know ModelCo and because I wear black liner every day. Because of this I went through quite a few black liners so I consider myself a bit of an expert. I was very disappointed with this. Firstly, it is not a proper black, I would describe it more of a dark grey even if you line over it a few times. It is more black on your hand and less on the eye. It does smudge but does not come off under water unless you wipe it then it slowly fades. So I guess it is kind of waterproof not fully though. It is streaky and doesn’t apply evenly on the eye. This would definitely not work well as a liner above eye shadows since it is streaky and the colour is not solid. It works fine on the waterline and it seems to last a fair amount of time there. This does not even come close to liquid eyeliners so I would only use this to line my waterline not as my main eye liner. I did like the sleek packaging though.