"Up to this point, installation was so complicated that it required a professional. "
Not even remotely true. The Nest wires the same as any other thermostat. Prior to the Nest there were plenty of inexpensive to high end devices with simple instructions included .
Not even remotely true. The Nest wires the same as any other thermostat. Prior to the Nest there were plenty of inexpensive to high end devices with simple instructions included .