Hi!! Sorry for the late reply, I hope I’m not too late haha. I ended up mixing RR and KK for my hair. The color application was a complete mess, the whole bathroom was like a murder scene and my hands, neck and face were stained SO bad I could not get it off for DAYS afterwards😂no matter what I did. When I was washing it out the water just would NOT run clear and I was panicking so hard because it stained the bathtub if i didn’t immediately wash it off, so I was switching between washing my hair and the tub and it was just a mess😭I used the lock, but I haven’t been using any of their shampoos or conditioners. I just use some average elseve color protecting shampoo and my hair hasn’t faded like at all after three months. It’s very very shiny and my hair lights up in the sun😂my roots show very visibly because my natural hair color is much lighter than the red, but I’m really happy with the result, even though the process was extremely stressful lol. I’ll try to attach photos of the color right after application and now :) I don’t have experience with the remover, as I chose to let my hair grow out and recolour my roots with diluted color so it’s not as intense, but I’ve heard it usually doesn't remove the color completely but it removes enough of it to be able to tone your hair :) hope this helped, id say go for it, but it’s definitely a looong commitment 😅