I like the concept of this but it's just horrific to use! I have greys mainly around my ears so I purchased this for in between dyes.
Well first off when you spray it, it just goes everywhere! I got it all over my skin and man it was such a mission to get it off. The parts of my hair that it was covering felt almost crunchy and overall it didn't look natural or blend in.
I would give this a hard pass, I think there are much better products out there to use. Big let down from Loreal!
I used the dark brown colour when I had Ombre hair, because my roots that grew out were lighter than the dark ombre colour. I definitely didn't use it everyday (as it makes your hair feel a bit crunchy at the roots) but I would use it when I wanted my hair to look like its just been done! It worked well and the brown colour matched almost perfectly!
It doesn't last ages, but its great for the odd occasion... to tie you over until your next hair appointment.
Tips: Be careful when applying it around the face- it can stain, which means you need to wash your face to get it off..... annoying if you have already done your makeup! So either use a barrier (a cloth/wipe) or do it prior to doing your makeup :)