Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A little messy, but your teeth feel so clean

I am only giving this product a 4 out of 5 due to the mess it makes. It could be my lack of coordination skills, but we purchased this for my son who recently got braces...well needless to say it makes a mess out of my bathroom and whoever is using it. lol I think it is a product that takes some getting used to.