Does what it says, dries hair faster, leaves it way more hydrated, but it doesnt heat up as much as my old hairdryer, therefore I feel Im not able to get the hair as straight/smooth. Thats why I only gave it four stars. Overall though, the health of my hair is important to me, so for that alone and the fact that it does actually dry my hair so much faster, its worth it! I do loose waves in my hair with a wide Cloud 9 after drying, so not having a perfect smooth blow dry doesnt really matter, but for those that just blow dry alone, theyd probably be a little disappointed. However, hydrated healthy hair matters more in my opinion -)