I like several things about it:
-The looks and build quality of it. Very cool looking for a thermostat
-The "learning" capability so that it basically programs itself once it understands how you routinely adjust the thermostat, though I admittedly don't touch mine a whole lot.
Things I wouldn't use:
-Smartphone interface to adjust the temperature....I would never use this, though I know the capability will give some people a stiffy