This is an excellent device! I did have difficulty the first two or three times with water spraying, but that has lessened significantly now that I have improved my acclimation with the device. I could tell the difference in my gums immediately.
This is easy to use, and comes with a choice of settings. It holds enough water to clean your whole mouth without a refilling. I like that you can turn the water flow on and off from the handle once the unit has been turned on.
If this does for my gums what my dentist said it would it will be a great product. But still, a lot of design flaws. You have to keep refilling it over and over before you're done. And there's a learning curve if you set the wand down while it's turned off water is still in the hose and will flood everything. You must learn to keep it in its holder at all times it's not in your hand. And with refilling the tank so many times it's easy to accidentally drop the Top which holds all the attachments into the water and then you have to dry everything off.