This thing is so addictive. I have actually had to force myself not to use it every day. The problem is that when used correctly and you are able to sustain a level where you reach super-os, you want to go on and on which just zaps your energy level the entire next day. I just love this thing! On the positive side (if the above could be considered a negative), the endless anal involuntary contractions I have been getting for hours on end have given my prostate the best prostate massage I could ever have imagined. Most all of my BPH symptoms have just disappeared. I sleep through the night without having to get up to pee. WOW, what a blessing to not have to medicate myself with chemicals.