Easy to use, the charge lasts a long time.My previous water flosser had sprung a leak after a few years and this one was just better and stronger and had more capacity, after second time I charged it, it just turned off in the middle of flossing. Now it's turned off again I have to plug it in to get it going, and sometimes it takes a lot of effort to get it primed. I think I just got a defective one.Try to exchange it through Amazon, but I kept being asked if I had done trouble shooting, and the representative on the chat just took such a long time, that I had to go.Tonight I tried again, and I had a real pro and she got the matter resolved In minutesGood for travelingStoped working after 2 weeks, don’t spend your money buying this item.Bought for my step daughter that has braces..works well. No new cavities!This product has useless directions. Once I figured out how to use it I quickly saw it was a total waste of time. This flosser has no power at all. The tiny stream of water that is supposed to be used to floss your teeth can barely be seen. I sprayed it on my hand on the highest speed and I couldn't feel the water. It didn't even wet my hand. I sprayed it on a Kleenex and it didn't even make a mark on the Kleenex wasn't wet at all. This is a total waste of money. Made in China and it should have stayed in China!Worked fine for a couple of weeks, and now it hardly works. The water does not come out strong enough to floss the teeth or remove food between your teeth.From the start the power of this floss was not strong as a corded water floss but for travel it was convenient. However, after a few months (and I haven’t even used it everyday, just when I traveled like once a month) it broke… now the floss turns on but no water comes out. I checked everything to see if there was particle stuck inside but could not find the solution. Definitely not worth the money.