I bought a unit similar to this one, same form factor and button layout only with 5-day plus Sat, Sun and we love it. The FILTER indicator is very useful and the ENERGY data registers are a good feature. If you don't need auto change-over, this is the model to buy. The back lighting is GREAT for when the room is dark. Some slight downside: the button sequences are just a tad cryptic and sometimes the unit won't stay level. You will get used to the key sequences however. Batteries last a VERY long time. Did I mention we love ours?