What can I tell you about this item. It works!
It's a good item - you can charge it using usb. you don't need the usual 3 to 2 adapter. With one full reservoir , one can clean mouth and this takes minutes. Any debris discovered is easily removed using the jet of water.
The jet of water isn't so great as to damage the gum line. It is painless to use.. I will suggest you use warm water so as not to aggravate sensitive gums.
The device comes ready to use - I'd suggest giving it a warm wash - be careful as it's an electric device.. no need to push any design thresholds for safety and sympathy for the device.
So far I've used the device everyday since it arrived and I've had no troubles keeping it stored, clean and charged for use. It came with a dust cover/bag which also keeps the jet tubes... if you're worried about cleaning the device - use sterilising tablets.. but this hasn't been officially offered as advice. Keep it clean and charged and it'll serve you well...
I charge after every use... it is comfortable in the hand and comfortable to use... is it better than fibre floss? For me, Yes.
I'll continue with this device and my dental checkup will reveal all... I'd say - buy your today!