This experience was neither nice nor easy. First, the smell. The only way I can think to describe it is "dragon farts." It does have the added benefit of burning away those pesky nostril hairs while coloring. This formula is described as, "Delightful, drip-free foam hair color." The lack of drips was my main reason for purchasing. It comes with the color bottle, the developer bottle (with foam lid to put on after mixing), gloves, 2 packets of conditioner and instructions. You still have to mix the developer and color so no saving steps there. You don't pump the cap to get the foam out, you squeeze the bottle. The foam seemed very runny to me and spilled as much as regular hair color. Once I got it all on, I put my hair up and tried cleaning off the spots I inevitably get on my skin. This stuff has staying power! Most hair colors wipe easily off my sink but not this stuff. I'm hoping the stain isn't permanent. Then, I went into another room for some fresh air so I didn't pass out. I left the color on for 30 minutes. I then rinsed it out and applied both packets of conditioner since my hair is long and thick. Once I rinsed that out, I let it air dry. Luckily, the smell pretty much disappeared once it was dry. The overall color, dark brown, is very nice and doesn't look black as they sometimes do the first few days. I wouldn't say it did a fantastic job covering my greys but it did turn them a sort of light, reddish color.
Personally, I would not use this again. Other companies are also making foam hair color. One of them has to not smell like Death is standing behind you breathing down your neck after having a garlic and rotten fish sandwich.