The reps kept saying dont over stimulate. Didnt make sense cause I felt that I was never stimulated. I figure out that there not one setting for all. You have to set a setting for 2 to 3 weeks to give your body time to adjust and for you to feel any improvement. It like the game hot or cold. If the setting not helping you are cold. If it feels better you are getting warm. If level 1 and 5 lites are good for me it might be worst for you. Just keep changing and play the game you get hot before you know it