This brush is very good. It was a gift from my wife when i expressed interest in a horse hair brush since i have badger, boar, and synthetic. After letting it soak, it gave a great lather. It's as expected after research- a great middle ground between badger and boar. it's has some backbone but is very soft with good water retention. it is also very attractive in person.
it's got a good size (my hands are average) and gave no trouble with loading a good lather. as with other hair brushes, it had a little odor but i expect it will wear off as my badgers did.
if you're curious with trying something different than badger but don't want the harshness that can be boar and don't like synthetic, horse is definitely your route. plus, for those who care, it's cruelty free.