I managed to get a load when amazon was doing 5 for £100. Ikea does not have energy monitoring and the 2.4Ghz WiFi module is cheap as chips compared to zigbee. Average price for a zigbee plug with energy monitoring is about £30-£50.
I'm not keen on having wifi IOT devices on my network so, 99% of mine is either z-wave (really expensive but I'm a big fan) & zigbee. Oh the Zigbee!!!!
I ordered a couple of these to try out before I saw Lidl items.
I've had not problems with these ones paired almost instantly and appears to do everything I expected but still only had a few days.
I'm still going to pick up some Lidl stuff on Sunday.
For me it depends.
It I want power monitoring I go with the smartthings plug around £30.
If I don’t want power monitoring I go innr for around £20.
If it it has no earth I have been trying sonoff for £15.