Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Healthiest gums ever

When I was a teenager, my gums were in such bad shape the dentist said I would have no teeth at all by age 20. I have been using WaterPik for many years, I've just purchased a new replacement at age 80 and a dentist recently asked me if I had just had my teeth cleaned. My teeth and gums are like a young person's and I thank WaterPik for that. I use it at least once a day and I receive compliments for my smile.The same old WaterPik I have been using for so many years is now being called a Water Flosser! It does that job, too. I recommend it for everyone, not only does it affect your appearance, it makes you feel sparkling bright after using it.