Having never used this type of product, I was not sure what to expect. I made operate two jaws and having a mouth full of scars, I needed a soft cleaning: this device has perfectly fulfilled its role. Gradually I increased the power and I'm still happy. I was apprehensive about the quality of the cleaning, but the surgeon and orthodontist are categorical: my mouth is healthy and perfectly clean. Furthermore, the reservoir is large allowing a good spring cleaning.