Okay, I heated them up and have 3 rollers, one of each size, in Rob's hair.
I don't know what you know about rollers so I am going to pretend you know nothing. The "ready lights" work, those are 2 of the medium size rollers with a red dot on the top which turn black when the rollers reach the perfect temp. the pins fit well onto the roller and over the hair. The roller grabs the hair better than some I have tried before, that would be because of the blue velvet stuff. Rob is not whining about heat so they must not put off too much but he did complain about a little pulling but that is to be expected.
Will post further upon removal.