i have curly hair, but right now it is cut into a pretty short asymmetrical crop. not much hair there to show off any curls. i used this shampoo at night and went to sleep with it wet to air dry and woke up with huge, soft curls on top of my head. can't imagine what it would be like with a full head of longer hair! the only reason i dropped a star off of the rating is because i definitely had to "repeat" with the shampoo. the package made it seem like it would make your hair instantly clean, but i had to use two rounds to get my hair feeling completely clean, and my hair is (as mentioned earlier) super dang short.