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Pro Can turn on/off automatically based on your location
The Lyric can turn on and off based on your location (or, more specifically, your phone's location). By default, this geo-fence is 7 miles, giving the thermostat enough time to get the back to a comfortable temperature. This can be changed, all the way down to 500 feet if you have a short commute.
Pro Futuristic design
It has a clean white front, with basic controls and large fonts. All the edges are trimmed with a stylish black, and the device produces an attractive glow behind it which helps make it stand out.
Pro Easy installation
The Lyric app provides step by step instructions, starting from removing your old thermostat all the way through until the end. There is just 1 small typo - the app says you don't need to connect the power wire (Rh) when indeed you do.
Con Not compatible with all routers
Your router needs to have DHCP (Dynamic Host Configuration Protocol) otherwise this thermostat won't connect to your network.
Con Specific (more expensive) battery requirements
In order to provide longer battery life, the Lyric requires a AAA lithium battery - regular AAA batteries won't provide sufficient juice.
The geo-fence feature can sometimes set the thermostat to 'away' while you're still in the house.
Notifications also don't always make it through, as sometimes all you get are generic looking error messages.
These bugs are likely to be fixed through future software updates, however currently they come as part of the product.