I've found that brushes in particular are so personal.
I hate boar bristle hair brushes. They are either too weak (bend too easily) for my hair or so firm that they scratch my scalp. I've also yet to find one that will make my hair behave, if you know what I mean.
I much prefer a wide paddle brush, a good one with the ball capped bristles. If the balls start falling off or they snag my hair, into the trash they go. When I find a good one, I'll keep it forever. I have one right now that I love but the handle broke off. I'm still using it, haha.
The type of brush you should use depends on the type of hair you have and the result you want to achieve.
Boar bristle brushes are usually great for medium hair density. It works well on most hair, but it tends to take a long time. It is not a great tools for finer hair textures, especially those prone to breakage. The tend to pull a little too much for fine hair. it causes damage. Boar bristle brushes are best utilized in situation where hair is being pulled straighter. The large amount of tension it uses is perfect for smoothing hair out.
I love my board bristle brush, but know when and how to use them is important.