Over-engineered and cumbersome.  NOT RECOMMENDED
This is an over-engineered, cumbersome water flosser.  Since you have to leave the water supply container open while using, the contraption is 14.5 inches tall.  The jet stream power is not sufficient to properly clean between teeth and certainly doesn't provide enough water massage power to help with gum issues.  I can't believe this product would get 4 stars?  Makes me wonder about the credibility of the reviews?  NOT recommended.
Rating: 1 stars