Instruct: Classify the given review into positive or negative sentiment.
Query: Healthy gums and less visit to dentist

I have been using Waterpik for a long time with moderate success except for removing debris between my teeth. Recently I purchased this new model that comes with various tips. The tip equipped with a tiny brush is a genius idea and does wonder to clean between teeth. I do not floss any longer except may be once a month. Even my dental hygienist complimented me and said that I had very little plaque. It is a $50 very well invested.