Mostly same comments as the reviewer below. I got mine for about $6-7 when I was in the US and absolutely love it. My hair feels so soft and clean after using it. I mainly use it for maintenance at night before bed. I don't usually use it during the day. Gives a lot of shine but I do have to flip my head over to make sure I get all of my hair as the bristles do no go through the other side.
I never knew how much dust my hair was collecting until I started using this brush. I remove the stray hairs from it after each use and clean it (with shampoo) about once a week or two. I wish I had gotten another one to use while one is drying. I give it about 24 hrs for the brush to dry after I wash it.
I only have 2 gripes:
1) the bristles stinks when you get it wet, which is makes sense since its coming from an animal. It does get better with time. At least I think that's what it is and its not me just getting used to the smell.
2) first week or so of use a bunch of bristles (maybe 20?) fell out. I was shocked. That being said there is still a substantial number of bristles and it doesn't look like its missing any at all.

I bought this for a little under $10.. I have long hair, about 7 or 8 inches past my shoulders, that is of medium thickness. While the bristles don't go fully through my hair if I brush just on top, I can completely brush out my hair by brushing on top and underneath. I love the shape of the brush (curved) and the size seems to be good enough for the length of my hair.
I love using this brush... I wanted a natural hair brush that would not break my hair as easily. This makes my hair baby soft and has pulled out *very* few strands, especially compared to my regular (not bristle) brush. I get a lot of volume and it makes my hair look "feathery." The bristles are also long enough to reach my scalp, which feels great!
Highly recommend!