same here - dark brown curly hair and a few stray wirey strands of grey (they are thicker and are not curled the way the rest of my hair is curled). I go to a hairdresser who covers those stray greys so well that I forget I have ever seen them. It is probably done once a quarter (I can check). And she does a superb job. Maybe it makes sense to compare prices between professional "grey blending" (this is how she calls the procedure) and at-home kits.