Very poor design: We actually bought two of these for a double vanity. The lift knob detached on one after only 2 weeks of use and off the other after about 8 months. And the design for the drain is incredibly delicate and makes the drain almost impossible to clear if it's clogged. There are two tiny parts, facing the back of the vanity, that need to be removed and replaced in order to lift out the stopper, and the directions for doing this are incorrect.