A great idea in theory but perhaps not the best option for everyone. I have a long pixie cut and there was just enough dye for full coverage so if u have longer or thicker hair, get extra dye. The application was easy. The included brush was great with strong bristles and the right size to color. Love the barrier oil. Would make cleanup a breeze for darker colors. Smell was pleasant and not over powering. I also have a sensitive scalp and the dye didn't burn or make my head itch like store brands. I started with a darker brown color on my hair with mousy blonde roots. I ordered the lightest ash blond but unfortunately the colour was not the desired result. My roots took the color well but after 50 minutes (10minutes more than the recommended time for stubborn greys) the best it got was a coopery/strawberry blond. It's not hideous but it's not great either. The ends which had a brown colour already didn't change at all. The shampoo and conditioner smelled amazing and my hair is very soft and shiny. Shame the color wasn't the expected result because otherwise it's a great idea and I would have happily had a subscription.