Dark colours would benefit most from this feature as the Maxi Brush promises "mistake free application." Not impossible but certainly easier to apply an even coat.
Royal Rose is a delicately shimmery salmon pink. A fresh summer colour. It's sheer as even after three coats as pictured, I can still see nail whites. Took a while to dry but the shiny finish is worth it.
It says on the bottle "Professional Finish up to 10 days". Will edit this post later to report if that's true!