Just wrapped up installing a new Ecobee smart thermostat for an elderly couple in Baytown! Their old mercury thermostat was WAY off on temperature readings. The new smart system required some additional wiring since their older system didn't have a C-wire, but I was able to install the power extender kit to solve this. Took time to set up the smartphone app for both of them and their daughter who lives out of state (they loved that feature for remote monitoring). Created a simple schedule based on their routine, and showed them how to use voice commands with their existing Amazon Echo. The wife was concerned about it being too complicated, so I wrote down step-by-step instructions for basic functions. Already seeing more balanced temps throughout their home! They should save around $15-20 monthly on their energy bills with the more precise control. Left my direct number in case they have questions while getting used to it.