This thermostat does the job and works on the Honeywell Total Comfort Connect app. It is a little harder to set up the wifi as you have to use your smart phone to enable it to connect. The model 8321WF thermostat does not require that step but all in all not a big deal.
Also, the HEAT OFF COOL selector is cumbersome to select since they are small and close together but again a minor issue.
Good value and greatly reduces the cartridge change frequency.
The price is right and it makes your ink last forever! I have found that after about a year, the jets tend to clog and have to be cleaned every time you want to print so just toss these cartridges and put in new ones. Since you are reusing the old chips, you have to ignore the "out of ink" warning but since they are clear, it is easy enough to see how much ink is left.