The Apalus is another flat heated hair brush, primarily for use on dry hair. It applies constant heat when you turn it on, although it takes longer to warm up than models which use metal ceramic heating technology (this one simply uses ceramic plates). It can reach 180°F in 60 seconds, but will take three minutes to hit its top temperature of 450°. That can make this unit frustrating to use if you have to straighten thick hair.

very good hair straightener.

Before curling, make sure your locks are completely dry and well combed. Put a heat protectant. Divide your hair into strands. Take one strand and run a flat iron through, twisting as you go. To get the better result, pin your curls and seal them with hairspray. Repeat until all strands are done. When your curls have cooled, release and gently brush them.
If you are looking for volume for your fine hair then I would recommend the Vidal Sassoon VSHA6471UK which is a superb hot air styler.  Designed especially to give lift and volume from the root it will give you enviable curls and waves.  It is supplied with two brush sizes 19mm and 25mm so it’s ideal for shorter styles too (use the smaller brush) and gives a pleasing smooth finish that is tangle free.  You cannot fault the price either, on this retails below the price of a salon blow-out.
hot immediately smooth easy to use recommended by my hairstylists and well worth the money have not owned a chi so can't compare.
Was worried following some negative reviews about this not being a genuine ghd product. However product arrived with ghd tag with details on how to register with ghd. This was done on the official ghd website and ghd have verified the product.