I never blow dry my hair because I hate the way my hair feels after. It just made my hair a big, uncontrolled mess while damaging it at the same time. I straighten my hair infrequently because it takes me too long (an hour) and the result is straight hair, but not very silky feeling. I got this blow dryer after my sister suggested it to me. I decided to give it a try and invest a bit into a blow dryer. It's worth every penny!!! It takes 10 to 15 minutes to completely dry my hair (I have very thick, medium to long wavy hair). My hair feels silky and soft and looks better than when I straighten it, only taking a quarter of the time! I couldn't stop touching my hair after the first time I used the blow dryer. The concentrator attachment is included (some of the other listings of this same product apparently didn't include it) and is quite useful when using a round brush.
You can continue doing your research for a great blow dryer, but there is seriously no need to look further! This is the best blow dryer I've ever used and would buy it again in a heart beat.