Yes, I have curly/wavy hair - my hair strands are thin, but I have a lot of hair (meaning my whole head of hair is actually thick) I need volume to my hair though because on the top of my hair is rather flat, while the bottom of my hair is curly/wavy and has a lot of volume making my hair look uneven if I don't use something to create volume.
I would tell you if you have dry hair, which most people with curly hair have, do not use this. The main ingredient is salt, which dries out the hair. This is also a very sticky spray, but it doesn't make your curls crunchy. Although I would suggest a different Not Your Mothers product, I do not know your hair type, color, or what your looking for. So this may or may not be a good thing to get for you personally.