"Not only is it more comfortable to dry my hair it also is effective in dispersing air evenly..."
I have been trying to find a decent alternative to the pricey Deva Dryer and this one was worth the investment.  My hair is very thick and takes about an hr- 1 1/2 to dry with the blowdryer I have a Revlon blowdryer and using that diffuser gave me more of a workout trying to finagle it to dry my hair more than evenly drying my hair.  After buying this product not only is it more comfortable to dry my hair it also is effective in dispersing air evenly from the dryer. It's also an added plus of not having to try to scrunch my hair with my hand before holding up the  diffuser as this collapsible feature makes it easier to have the diffuser cradle my curls versus me having to hold my curls to my head then place the diffuser there.  The only thing stopping me from giving this product a full 5 stars is that the collapsible feature of the diffuser also makes it get stuck vs having a spring back effect that would make it easier when holding the dryer all over your head continuously- which is really more of a preference than a serious problem.
Rating: 4 stars