I bought the UP7009-1-5-BN online as a lark, because the chrome plating on our existing kitchen sink fixture was peeling off. Working on the sink is always challenging, but I managed to remove the old fixture and install the new one with minimal cursing. I expected some whining from family members as they learned to use the sensor, but it has really gone quite smoothly. The valve is quiet and reliable. It will be months before I can intelligently comment on battery life, and years before I can intelligently comment on the longevity of the fixture. But the experience of ordering, installing, and using the fixture has been uniformly positive.