well designed. The oval window in the center of the device appears to
be a button--it is raised and distinctly colored, and is placed in a
prominent location. However, it's not a button at all.
The actual soap-dispensing action is caused by the light-grey button
at the bottom of the device. While this button is conspicuous, its
proper use is not obvious. In general, buttons are pushed with the
tips of one or more fingers; in spite of that, this button must be
pushed with the heel of the hand. Due to the position of the nozzle
beneath this button, other actions will cause the soap to dispense on
to the floor. The required hand position is not obvious, and no help,
such as a graphic, is provided.
-- Kevin Gessner
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