Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Terrible, useless

This seat is not only useless as it does not fit most of the toilet seats, but it is also dangerous. It slips and slides on the toilet and my son was holding himself on it not to slide off. In addition the opening is so small that the poor guy had a painful indent on his behind.At this point I dont know what the alternative is, but this is definitely NOT it.