The Bigen Cream Color 4-0 Dark Brown was just okay for me. The color wasn't exactly what I wanted and the coverage on my gray hair was average. The one-push application was easy to use, but I don't think I'll purchase this product again.

The Bigen Cream Color 4-0 Dark Brown is my go-to hair color. It's so easy to use and gives me the perfect shade of dark brown. The coverage on my gray hair is amazing and it lasts for a decent amount of time. I highly recommend this product to anyone looking for a reliable hair color.

The Bigen Cream Color 4-0 Dark Brown is my go-to hair color. It's super easy to use with the one push application and it gives me the perfect dark brown shade. The coverage is great and it lasts a long time. Love it!

I tried the Bigen Cream Color 4-0 Dark Brown and it was decent. The one push application is simple, but the color turned out a bit lighter than I expected. It also didn't fully cover my gray hair. It's an okay product for me.

I have mixed feelings about the Bigen Cream Color 4-0 Dark Brown. The one push application is convenient, but the color payoff wasn't as intense as I expected. It also didn't cover all my gray hair. It's an average product for me.