I have coloured my hair for years with supermarket products and none of them are as good as Tints of Nature. For me, grey hair coverage is 100% (unless I miss any in the application). For my shortish hair, a box can last me 1 full application and a couple of retouches. I leaves my hair looking healthy and with a pleasant smell (not chemical smell). And it doesn\'t leave a band of colour on my forehead. Highly recommended.