"I actually got this for a preset at Christmas and set it up in late December. The setup was a bit finicky -- the little detection arm that picks up on the rotating disc on the electric meter has to be positioned just righ (down to the milimeter). Also, I have found that in very cold weather, the rubber gaskets (I'm guessing) inside the positioning arm contract, and the arm gets out of alignment. You immediately know it's out of alignment because your "usage" drops to just 2 cents per KHr - not normal in my household.
Beyond those minor setup issues, the unit works great. I have the base unit very close to the sending unit outside the house, so I can't speak to the transmission distance.
It's great to get the instand readout and then go hunting for the baseboard heater that is set to high, turn it down, and see the readout also drop. It has definitely changed out habits when it comes to using our bathroom heater, the baseboard heaters and even some vampire charging bricks that were plugged in all the time.
Again, the instant readout makes the difference - immediate gratification when you unplug or turn something off. Have shown it to my kids and they are taking a more active role in shutting down unnecessary electrical appliances and lights.
Buy it -- it'll change your perspective on electrical energy use."
What is your level of technical expertise? Home Handyman