I have been using this twice a day for almost 2 weeks and already see a noticeable difference. My stomach is a lot tighter, more defined and flatter. You can feel your abs pulsating when you use it so I know it’s activating them. I use it on mode one level 5-7 on the lower part of my stomach then again on the upper part. Also I have had no issues with charging it and it holds a charge for about 1 week. Don’t hesitate just buy it!