I like that this is compatible with Amazon Alexa, as well as other voice assistants such as Google Assistant or Apple HomeKit! It's super easy to set up - just plug it in (if you have wireless) then open app on phone/tablet where there are instructions available online if needed.
Nothing really at all bad about this product so far but haven't tried many of their competitors yet either :) This helps us keep track of who has access when we're out from home without having an extra key hanging around somewhere else etc..