I recently had my old thermostat die out, so needed a replacement asap. I found the Honeywell 7 Day Programmable Digital Thermostat was best for my needs. It offers 7 individual day programming; each day can be set differently. I found this very easy to install (turn off your power first!). The instructions are very clear and are compatible with any heat system and air conditioning unit. I am able to hold the temperature or change it at ease with weather temperature fluctuations. I found this product was about $6 cheaper at Walmart than my local Home Depot. If I needed a new one again, I would definitely choose Honeywell.