Love them. They make the perfect waves without having to use a heat tool. If you want, you can use your blow dryer, but you can always just let your hair air dry with these. You get 12 clips. So, if your hair is medium to long length, you might want to purchase 2 packs. I have medium length hair, and it takes the length of 2 clips to do each section of hair. Here's the info about them from Ulta.com
•Easy to use
•Clip & style
1. Apply setting lotion or gel to damp hair. Depending on thickness of the hair, part into one inch sections or less. If the hair is thin, part into approximately one and a half inch sections.
2. Open the wave clips by gently releasing the two small tabs at the base of the clips. Slide the open clip over hair, release handle and press gently to lock the tabs, Be sure to leave a small space, about 1/2 inch between each clip to create continuous looking waves. Leave the Wave Clip on until hair is completely dry. Air dry, or use a blow dryer to speed up the process.
3. Remove clip once hair is dry. Finish by finger combing and mist with hair spray.