I got selected to try one of Vidal Sassoon's London Luxe hair dyes by BzzAgent. I had actually JUST decided that I wanted to try red hair so I went with Merlot Vibrant Red.
My hair before dyeing was a mix of light brown/dark brown/blonde so it unfortunately did not dye evenly.
Both of these pictures were taken within 5 minutes of each other after rinsing:
It barely looks like I dyed my hair?!?!
The dye spread very unevenly, but it was my own fault. I didn't wait until my previous hair dye was totally faded so it mostly only picked up at my roots. I was very unhappy with the results. The blonde of my hair was so vibrant red I felt like Carrot Top and the rest looked the exact same.
This is my hair weeks later:
Still a little bit of red, but it definitely looks better.
I have previously used a purple hair dye by this brand and it worked MUCH better, so it definitely depends on the colour you choose and the original state of your hair.
I would rate this specific hair dye experience 2/5.