I must say, it did a good job of covering my roots (about an inch of regrowth) minus the ammonia smell.
HOWEVER it left my hair crazy dry and brittle! I've been dyeing my hair for quite some time now but I haven't experienced brittleness like this. It's been almost a week and still, post-shampoo it feels coarse. I have to put on intense conditioner to soften my strands up.
Overall, I might just stick to regular dyes next time but I'd want to try other bubble dye brands though :)