Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Honeywell RTH7500 works well on my Heat Pump System

I didn't give it 5 stars only because I've only had this thermostat running for 3 weeks now with no hiccups. It's fairly easy to program for each day of the week and can have multiple daily start/stop times, too. I started by opening up the old thermostat while it was operational, writing down all the wire connections,(I had 8) and then emailing that info to Honeywell tech support. They responded within 2 days with the correct wiring for the RTH7500. Installing was easy. Make sure the power is off to the compressor/pump and no voltages are on any of the wires before you install this thermostat. Also, if there is a big hole where the wires come through the wall, make sure you plug it up as best as you can. This could cause your thermostat to turn on more than it should. Hopefully it will have paid for itself by the end of winter.