I found these very easy to link in with the TCP app and after that linking to Amazon Alexa. Since then I have used the TCP app to link to bulbs and sockets from other suppliers too. The TCP app is very user friendly and remembers my Wi-Fi password, unlike some others I have tried.
The colour is fine for domestic rooms, not overly white, that makes some bulbs not easy to relax with. I like the dimming too. It works well through Alexa as well as the app.
I know people do have problems with linking smart electricals to Alexa at times, so the ease this went through and the simplicity of the screens makes these well worth considering for Alexa use. I can't comment on Google use because I have never tried it.