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I bought this to replace a Belkin Wemo smart plug. The Wemo would be slow to respond to commands, would occasionally drop off the network and I would often get "Device isn't responding" when used with Alexa (but it would always switch on when asked to the second time). I also wanted to be able to pair it with a Hue sensor without using FTTT.
The Hue smart plug responds very quickly to the sensor and voice commands via Alexa, and so far I've had no issues with it losing its connection or failing to respond to my voice commands via Alexa. It's not as bulky as the Wemo, but still impedes access to any socket next to it (see photo).
One disadvantage compared to the Wemo plug is that it doesn't monitor power usage.
Would be an easy 5 stars if the form factor was smaller and it had power monitoring.