bristles on small brush are not lined up with exit spaces on barrel, rendering it barely effective
This product does work... it gets hot enough (to burn my scalp if I'm not careful), and does volumize and curl my fairly short (mid neck length) hair.  Due to my hair length, I needed a smaller diameter brush.  The negatives - gets very hot with small brush, which I kind of like, but the controls for this are a rotating ring on the base of the handle, very hard to figure which way I'm going to change temp and air flow.  Next and the main reason I am unhappy with it, is the bristles for the small diameter brush are not lined up with the spaces in the brush barrel and do not stick straight out, and therefore, do not catch my (very fine and straight) hair adequately.  I have similar brushes that have the same problem that I have had to throw away, and some that are absolutely excellent (see picture, this device on Left, bad bristles; Right awesome bristles on a fantastic brush).  Last issue, even when I have turned it to the off button, there is a light left on (2nd pic).  Have to hit the breaker in the plug to turn it off.
Rating: 3 stars