Have the Nest: it just works, design top, family understand this domotica peace. Unfortunately the Nest api ended by Google. Integration with Homey is a bit disappointing, thnx to Google.
Temperature stays nice, no big differences in temperature.
Before Nest i had Tado and Thermosmart. Tado is nice but a ugly design and you need a subscription for special features. Thermosmart had large temperature differences (deal breaker)and also a ugly design.
Most important in my family was its design. WAF is top. Everyone in my house understands how the thermostat works. Its is the most simple thermostat. As for the others I had to explain how they work.