I'm happy with the Bigen Cream Color 4-0 Dark Brown. The one push application is so convenient and mess-free. The color is a nice dark brown and it covers my gray hair nicely. Overall, a good product.

I've been using the Bigen Cream Color 4-0 Dark Brown for a while now and it's been good. The one push application is handy and mess-free, and the color is a nice dark brown shade. It covers my gray hair decently. Good product overall.

I'm really happy with the Bigen Cream Color 4-0 Dark Brown. The one push application is so easy and the color is a perfect dark brown. It covers my gray hair completely and lasts a long time. Highly recommend!

The Bigen Cream Color 4-0 Dark Brown is a great product. It is easy to apply and gives good coverage to my gray hair. I also appreciate the fact that there's no need to pre-mix it. Overall, I am satisfied with the results.

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