I just got it installed, so we haven't lived with it yet. I like what I see so far. I bought this for 3 reasons: Our utility is offering a $100 rebate on upgrading to a smart thermostat and this one is on the list, so with the rebate it is costing me about $12 - good enough price point to dump my 8 year old touch screen programmable. 2. I was getting frustrated with the programming of the old thermostat, I couldn't get the program to match our life well enough. 3. The geo-fencing feature means that I don't have to be able to predict our days in advance, the thermostat makes it comfortable when we are actually home and saves money when we aren't. The smallest circle I could make is about a half mile radius (my wife works a mile from home).Some things I learned since I bought it.It is compatible with Google Assistant so you can control it with voice commands from your phone alone. I haven't gotten this to work yet, but it is supposed to. I may have to chat with tech support again.If you don't use the geo-fencing, you can program it manually 5 and 2, 5-1-1, each day separate, or all days the same. There are 4 time periods in the day; wake, work, home, sleep. If you are using Geo-fencing, then it has home, away, and sleep. You can also choose to not have a schedule and just make it the same temperature all the time and adjust it manually.Your router has to be on 2.4GHz.You have to have the C wire and it has to be connected to the thermostat and furnace or there is no power for the thermostat. Older systems didn't use the C wire (blue on standard 18/2 thermostat wire) so you might not have 5 wires to the thermostat. Some newer thermostats didn't use the C wire and used batteries to power the programmable part of the thermostat.It will automatically switch from heating to cooling, but it is a choice and the factory default is for that to be manual.It uses the internet connection to know the outside temp and humidity to anticipate the need for heat or cool. It displays on the app and I wish it displayed on the thermostat.The fan has settings for on, off, auto, and circulate (I haven't figured out what that is).You can control the thermostat with 4 different users, and each of them can have a different geo-fence circle. If you do have multiple users, each has to install the lyric app and create an account. The manual doesn't tell you this: when you first set up the thermostat, you do it from one phone. Then from that phone, you add the other users before they can connect to the thermostat from their app.If all the users are away, but someone is house-sitting, they aren't stuck with your away temperature. They can control the thermostat manually just by touching the screen. You can also set a vacation time by start and end date so it will stay on the away temperature 24 hours a day. You get an alert on your phone if you are away and the status changes. You can also set a notification for it to alert you if the temperature goes above or below limits you set, so you know if you have a power failure, or ran out of fuel.The T6 is essentially the same thermostat, but packaged and designed for new construction contractor installations. The T6 only comes in white, the T5 only comes in black. The Lyric round is the one that has the led lights that bathe the wall with a color to tell you what mode it is in.