Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Best designed stool

This product is fantastic,kick the stool across the room and hop up on it and instantly becomes immobile has 3 casters in the bottom that are spring loaded in the vertical axis it takes about 20 to 30 pounds to seat the stool firmly on the floor a rubber gasket around the edge keeps it from moving on any level or almost level surface you can find these in libraries where they have withstood 60 years+ of abuse. A must have for height impaired individuals.