Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Product....should've bought this a long time ago!

Very easy to use. Painless to clean in between your teeth compare to traditional flossing. I have been using this for about almost a month and I can feel my gums improve! I am very happy with this purchase and urge people to get it if you have gum problems, or if you are just too lazy to floss. 90 seconds twice a day is all you need.