This was my favorite product that I used when I kept my hair purple for a few months during my maternity leave. I tried a variety of different at home brands including Manic Panic, but La Riche was the only one that kept it's bold tones past 1 wash.
I felt my hair looked not only va-va-voom purple, but it felt nourished and looked lovely and shiney too.
Sadly good things come to an end and while I did get a couple of washes before the colour started to fade, fade it will ( I swear I almost cry when I wash my hair and see all the purple go down the drain) I used this on pre-lightened hair, so in general It was less likely to hold the colour for long.
Price wise I do find it a good buy, with a decent amount of product so that meduim to long hair will get away with 1 pot per application.
1 thing I did find however is that evetually my hair turned to these different shades of grey, green, aqua, blue and purple as it washed and faded out. I personally didn't mind this at all, it was like having a different style every week as it faded right down.
I would totally use this again and would like to try other colours in the future.