I use that on my mare, mine is a little bigger, and I found the rope rubs her nose, so I wrapped it in fleece. I've found she's VERY responsive to it, gives quickly and effectively with just a squeeze on the reins. Make sure if you purchase one the rope the reins clip to runs through metal rings, don't get the variety where they run through rope loops, the metal rings provide more immediate release of pressure.
We have an MFT at the rescue who just bull through bits, we only ride him very rarely because he has tying up syndrome, but when he feels good we have to go in a kimberwick, which he'll still pull through. I tried him the other day in this hackamore and he gave to it softly and effectively, he was fantastic!! Even wrapped in fleece the indian hackamore is a great tool. Don't underestimate it's strength though, setting it too low can be dangerous. Always keep it at least 2 inches up from the corner of the horse's mouth. I do 3 inches on my horses but that may vary, you want it securely on the boney part of the nose, not the soft area.
Good luck, hope your horse loves it as much as mine does