I finally got around to trying this root retouch between two GOOD full-head dye sessions, and I must say, it’s not bad at all.
The colour is slightly darker and colder than my usual pomegranate red shade, closer to a cherry tone, but it blends nicely from root to tip.
What impresses me the most is the colour's longevity and the shiny finish: it stays intense and provides 100% grey coverage.
It’s a quick, affordable fix that's definitely worth keeping handy.