Where do I even start? I thought this thing would be cheap and weak but it has so many settings, it's almost too powerful in most of them. I was at level 5 and it felt incredible! I never believed these things would work, especially when they were cheaper than the ones at the store but it did great. The attachments are a plus but you're more than likely going to just use the "ball" as an average, everyday user. I've only use this a couple of times without issue but the key thing here is - it is well worth the price. It has a display that tells you how strong you have it set to, is easy to use, and also gives you the battery life to boot. The on/off switch is a mechanical switch so it won't accidentally be turned on or off, but the choices in strength are at a touch of a couple of buttons. Get one! You won't be disappointed.