Great to have a touch sensor, takes some getting used to.. Only been installed for 2 months and continually replacing batteries.  Sometimes it just turns on by itself! Then it shuts off by itself..  My electrician said the batteries should last a good year or more.  I would hard wire it because you have to get under your sink to find the battery cartridge when its out, and with an apron sink it's not easy.  I wouldn't buy this particular one again.. would go with a more reputable name and spend a little more for this feature.