When I first heard about this product, I thought the foam aspect was really neat, but having used it now I think the foam makes for uneven application and the entire process takes longer. And another main con, this stuff stinks of strong ammonia! Does all permanent hairdye smell of ammonia? It was like putting cat pee all over my head, I hated it, I stood out on my balcony for the majority of the 25 minutes because it was so strong. And I threw the bag with the garbage out right away, in fear that my cats would start peeing in my bathroom. I would not purchase this again because of the smell.
As for the shade, I picked one that turned out to be too dark for me, it's almost black (with a red tint eww). I would say this is my own fault, but it was the only shade that interested me. Also, I got staining on my scalp and along my forehead hairline, I assume this will come out after repeated washing. I hope this hairdye tones down as I wash it too.
Have you tried the Clairol Colorblend Foam? What your favourite hair dye?