I really like this product. It functions exactly as described... and be sure to send in the orange wire to make it part of the z-wave mesh and propagate z-wave signals to other devices in your home.
I'm controlling with a custom built HSTouch interface from my iPhone and desktop app.
It's also nice to have the auto (switches heat/cool as needed) feature. My old thermostat didn't have that and an excelent feature.
I control the thermostat by using HomeSeer to sample multiple temp sensors I have around the home.