Once the unit is loaded, I can tell you that I was not very reassured. This is nothing like a Flosser. In fact, it is a device containing a small reservoir (which may contain mouthwash half cap). Then you put the cannula, you press the power button. And then nothing. So is that the unit must be powerful. I placed the cannula near the gum between two teeth, I pressed the submit button jet and there ... the sound is impressive the first time and strength of the jet (mouthwash / air also ). I bled but I expected (I am sensitive gums) but I have bled in one place. And it does not hurt. Really painless. I did all the interior and exterior teeth with the same tank. Of course, as is cautious at first, I took over 30 seconds to make the mouth. Yes but the effect is great, I feel good after a few weeks of use, I have less plaque. (It feels to the touch with the language) I made almost the same as the dentist and I stopped bleeding. Furthermore, this device removes small foods that were stuck between the two and had not gone with my electric toothbrush and the Flosser.
Ultimately, this unit is great. It greatly contributes to oral hygiene. And the more we can take him on a journey with its cover. One downside, the display contains only two cannulas or sometimes in a family, it can be more ... and in general, there are 4 slots available.