Apparently, it all depends on your hair and how you're using your brush.
I have enough 3C-4A curls for about four heads, so I find it best to detangle in the shower with lots of conditioner and a wide-toothed (Mebco) comb. (There is always a small amount of shedding. That's normal.)
Once I'm out of the shower, I spray my hair with my water-oil-aloe mix, apply gobs of leave-in conditioner and then distribute it with my Denman D3. (My hair is already pretty much detangled, so there is no shedding at all!)
(Someone here said if you have thick hair, not to buy the Denman D3, but again, it might be how you use it and with what products. My Denman and I are BFFs!