not effective for my already slightly curled lashes [SEP] i didn t realize this item came straight from china although it was obviously in stock in the us there is chinese writing on the box and the directions were obviously with translated pretty well or written by someone who didn t know englis as well as they shouldthe product arrives nicely packaged in a nice box battery is not includedi thought the ridges of the heating element would be longer to act as more of a comb they are not you are pushing the lashes with this not combing thru themmy lashes have some curl i saw very small improvement with this tool i ve tried both heat settingsthe light does not turn when it is hot but you can definitely feel itergonomically this tool is a good size and easy to holdi didn t realize when i ordered this that you use it after mascara is applied make sure you clean it every time you use itoverall for me this has little value and seems like more of a gimmick maybe if my lashes were straighter that would not be the case