I'm relatively grey around my face and on top of my head, so needless to say I'm touching up my roots often.
I trialled the L'Oreal Paris Magic Retouch spray, in a light brown. My hair tends to be light brown with a tinge of auburn at the moment, so it seemed like the best match.
The spray itself has a nice narrow nozzle for accurate spraying where needed.
Using it, I found it a little messy and found droplets in the sink where I was applying it - maybe I held it too close to my head, but to get a level of accuracy when applying to my roots I needed to hold it relatively close. It also felt incredibly cold too apply, and really 'blasted' the colour out. For me, the colour seemed to have a green tint to it, and while it blended okay with my hair colour, around my hair line it was too obvious, and too green. It felt like I'd painted hair colour on badly rather than lightly touching up my greys/roots. In my parting, the coverage and naturalness was much better, but that may be helped by the fact that I can't look too closely at the top of my head. The husband thought it looked 'okay' though.
Assuming you get the right shade, it definitely covers the greys well, and doesn't appear to come off on my hands or clothing through the day, so it wears really well until its washed out.
I tend to use 'mascara' touch ups rather than a spray, but the green tint in the Light Brown shade I received was really off putting for me, and the product dispersed in quite a heavy manner, which also wasn't to my liking. Any attempt to spray lightly resulted in the splatters of product in the sink, so it seemed to be an 'all or nothing' kind of application.
Not the product for me unfortunately.
from my point of view ,this product does not have too much use , its very hard to apply , and when its totally applied on you hair ,its very difficult to cover all the parts you need , the consistency is very thick so it can easily transfered to other stuff .