I have not personally used it, it has gotten mixed reviews, so probably OK but not the 5th wonder of the world !
I still stand by my tried & true annual Klasse + P&S Bead Maker every 2nd or 3rd wash, claybar as needed before the annual wax.
The grey bottle Klasse holds up better than the red bottle, but it does take patience & some finesse to apply correctly else it streaks.
How long any of this stuff lasts depends on a ton of environmental variables and how often you wash (how and what you wash with).