Seems like a good deal on this smart thermostat which rates well against Nest and Hive. Only been cheaper than this on one occasion according to Camelcamelcamel. This is the v2 rather than v3, but according to Tado's website the only difference is that it comes with an older hub which has no pairing button and is not Apple Homekit compatible. Not a problem if you're an Echo/Smart things user like me though.
Link to SmartThings smart app: https://community.smartthings.com/t/release-tado-connect/65465