So the good points first! It's an excellent price, it doesnt smell too bad, there is a decent amount of product which easily covers my shoulder length hair, and the best bit.. it absolutely and totally covers my grey hair.
The not so fab is its longevity. I have used this product in dark brown and red shades. The dark brown shades work great and last until my roots need done, the red unfortunately, not so great. When I used a bright red over pre lightened hair it fell out really quickly, it looked a washy corally red after a week. The dark red over darker hair was more successful but still not great, it definitely lost vibrancy after a few washes and needed redone after 4 weeks.
I have used #30 dark brown as my hair is dark brown. I mainly used for grey coverage. This is the third chance I've given this. Unfortunately for me it did not cover all of my grey-some but most are still visible. The desired colour was also not achieved. Instead of a dark brown my hair is a medium-dark brown and is very noticeably lighter on top (from the roots to where my natural colour ends). The after colour conditioner smells nice and left my hair soft but it just doesn't make up for the colour -or lack of.