I bought the pure bristle hair brush, pocket size. At the very first time, I was a bit skeptical about this brush as it is quite costly and the brush is smaller than I expected. However, after I've been using it for a while, I can really feel the difference it made to my hair. I brushed it like, 2-3 times a day and my hair is no longer tangling, also I don't need to use heated straightening iron to have my hair in place - so for sure my hair isn't super dry anymore. I now only blow dry my hair and use the brush in the morning and before night time (sometimes once during the day).
One of the good things I now love about this brush is the size if actually quite right! I can put it in my purse and carry it to office or wherever.