These are quick and easy for those who have trouble using traditional curling methods. However, I recommend leaving the shells in longer than what the directions say in order to give the style more time to set. I usually leave them in while I do my makeup and get dressed before taking them out. I had to experiment to find the proper length of time to leave them in. I have thick, medium-coarse hair and it takes about 30 minutes of setting time. My hair holds the curl pretty well, almost all day. However, like most curling methods, it works better on day-two hair. Overall, great product!