Needs a C wire, and only has 4 periods per day. Not good for me
I actually have that exact thermostat and installed a c wire myself.
I watched a vid or 2 on youtube and purchased a "AC to DC 24V 500mA power adapter" on ebay for $6.
I had an outlet on the baseboard aprox 10 ft away. Plugged in the adapter and ran the wires behind the baseboard till right under my thermostat. Drilled a small hole right above the baseboard and ran the wire through the hole, behind the wall, to the back of the thermostat. Was quite simple.
Note: my old thermostat had only 2 wires (red and white) so adding an external power source was the only option, if yours has more than that, there may be a simple fix of just adjusting some wire on the boiler.
And BTW having a wifi thermostat is awesome.