Not sure the merits of the 'voice input' devices - I have played briefly with Cortana but the interface with other applications was a bit flaky about 12 months ago. It may have improved by now.
For keyboard input/ android App control of devices I have used (and still do ) use Energenie which as a UK business supplies product which is well made and probably merits its CE markings. It also offers a seemingly solid software and control interface. I have used their tech support a couple of times and it is good to talk to intelligent, interested techs. However the products come at a price! The light switches have been rock solid. Possibly a little behind the game with product facility launch buit the support makes up for that.
SONOFF devices which can be sourced UK or China appear better than much Chinese tatt but not sure if the CE marking means a lot? The triple light switches I have , have performed well over a 6 month period but there are 1 or 2 tricks about installing them. Big user base and plenty of net support, but forget manufacturer support. They can also be flashed to support other home control standards.
The best thing with all devices is the use of IFTTT - if you can think of it somebody has already done the hardwork! It also allows you to mix manufacturers kit and provide a common interface.
Will be interested to find what you do choose and how you exploit it
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