Yes. I think you need to be living in a place like Arizona in the summer to not bother. You won't know if it works till you try it.
ETA: BTW, the image of my mom's hair that I posted before to show off the difference the S Curl made to her hair was taken in AZ in spring. So yeah, I take back saying not to bother if in AZ.
Well its pretty cheap, only £5 so I dont have too much to lose