I have curly hair and it's hard to blow dry my hair without drying out the curls and making my hair frizzy. The diffuser that came with my Conair Infiniti Pro works wonderfully! It's bigger than any other diffuser I've ever seen so it dries a bigger area at a time which makes it quicker. And it didn't dry out my curls. I love this blow dryer and recommend it for curly hair. I haven't tried to straighten my hair yet but I feel the power of it and can imagine how quickly it must work for straight styles as well.