Plantur 39 Colour Brown Shampoo and Conditioner is a good product range to temporarily darken/brown the roots of the hair. There is visible change after the 2nd use. It is most effective on the roots but leaves the length of the hair with a darker, richer brown. True to the Plantur brand, the product helps with hair loss and breakage. Both the shampoo and conditioner should be used together and the should be used together for at least a period of two weeks, depending in the desired results

These are my pros and cons (my hair is long, curly, dark brown and had not been dyed within the last 6 months prior to use);

Pros:
Smells very nice
Leaves hair feeling smooth and soft
Efective on 1st/2nd use for darkening roots

Cons:
Shampoo and conditioner must be left in hair for at least 10mins each
Conditioner is quite run and quickly drips off hair
The price is a bit steep
Product must be used constantly over a longer period for best results with preventing hair loss