Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent for smaller mouths

THe ultra compact brush heads for Sonicare are excellent for smaller mouths. By switching to them (from the Compact ones) I was able to better clean my teath and in between my braces. Also, getting to the hard to reach places is much easier and minimizes the toothpaste splatter that inevitably occured when I was brushing with the Compact brush head.