Oh yeah!
It's HUUUUGE on the hair boards!
HUUUGE!
The thing is, it's not to make your hair grow faster than it's already doing, it's for unseen fungal infections on th scalp that may be hindering the hair's growth.
Also the Mane and Tail is popular and has been for a long time, the thing is the stuff in the store is not the strength of the stuff for grooming horses, it was made to cater to people based off the horse grooming products because, well, people were using it becaus it did so well on horses!
Shapely's MTG you do still have to buy from a vet or vet supply because it too, is for skin issues on horses; it's expensive and stinks but I have used it on horses to break up fungal infections and it surely works.
I have never used any of this stuff personally, though.
I can't vouch for the monistat and can only vouch for the others on how it works on horses!