I had an Delta Essa Touch Faucet installed today by a plumber.  While I like the faucet very much, the touch mechanism only seems to work on the handle and base, not on the curved faucet itself as shown in the demonstrations.  While this is not a big problem, it is inconvenient when I go to touch it on or off on the faucet area and nothing happens.  I would really like it to work as advertised.