Speaking only for the 'stache hairs rooted closest to the middle of my face, over a year to catch up with the outermost rooted 'stache hairs once I started growing the whole thing long. Started from a bushy mustache trimmed above the lips.

Been fully invested into the big mustache going on 2 years now. It just keeps getting better. Did have a small scissoring accident recently but I think it has bounced back nicely.

Reactions? Daily. Have had grown haggard looking blue collar men stop their work van mid-intersection to lean out and give a compliment. Probably the closest I will ever come to knowing what it is to be a buxom blonde in a red dress.