I have been trying to get feedback from people's experience with these breaker box monitoring tools. Do any of them work and provide useful data. I frequently get called by people who want me to audit their homes to tell them exactly where all their power/energy is being used and why their bills are so high. In a one day audit, one can't really do that without knowing a detailed breakdown of the energy usage over time, though one can make some educated guesses based on HVAC quality, but that is not a complete picture. The typical question: "where is all my energy going?"