For years I had been attempting to blow dry my hair with my radial brushes but it took too long and I just couldn't get the coordination going.
I treated myself to this hot air styler and it is amazing! Looks bulky but it is super light weight. Essentially you have different settings for the heat and a button to make it rotate. The brush can rotate both ways so it makes blow drying way easier.
The brush is around 3 inches wide so I find using smaller sections works best. You place your section of hair on the brush, it will rotate and pull your hair through the bristles. You can roll the hair up on the bristles then stop the rotation for a more bouncy look.
It takes a bit of getting use to though. Be careful with your sections as hair on either side can get tangled up in the rotation and become knotty. Sometimes my hair gets caught and the brush keeps rotating which hurts, so you've got to keep an eye on what your hair is up to!
Totally cut down the time it took to blow dry my hair and now I can have perfect bouncy hair everyday. So worth the money!