The sensing faucet is great because you don't have to touch anything if your hands are filthy.  Mechanism works great.  Only complaint is that I didn't see anything in the instructions about removing the plastic coating from the sensor and couldn't figure out why it wouldn't work after it was installed (a very easy process).  After looking at the troubleshooting page I realized there was a cover on the sensor.  Once I removed it, everything was fine.