I have purchased several smart plugs in the past and more recently smart bulbs all of which work well and have been very reliable.Unlike a previous purchase from a different maker.
I've used these bulbs before, so I already have the Smart life app for configuring. They are easy to set up out of the box, and so far I've had no issues or failures. I always have to configure manually - but it's easy to do. That's the reason only 4 stars.