If your hair likes protein, it might well like Mane 'n' Tail. Otherwise, you will end up with frizzy straw...it all depends on your hair type, and personal hair likes/dislikes Most times, I find experimenting is the only way to know for sure. Hair is very unique and personal.

ps I have seen many lovely horses who used it successfully
Finer, mixed with coarser strands, low-porosity, wavy curly whirly hair...3A, 2C hair. Medium thickness, medium elasticity.
S-shaped hair with corkscrew ends. My hair is even more confused than me ;p
My hair officially hates protein Once a month is enough!
Currently a fan of TiGi products, (rock on, TiGi Curlesque styling creme!) but that will soon change - I am a self-avowed product junkie! Yay!
BIG fan of supersoaker method - thanks Rudeechick!