Just to add another option. In addition to the Sengled plugs, I also use the TP-Link KP-115, which I run using the community TP-Link Edge driver [channel invite] from @BarryA (rather than SmartThings native LAN integration).
Both work well, although with my home and network topography I’ve found the LAN-based KP-115 can run reliably at much greater distances than the Sengled without having to add zigbee repeaters where they wouldn’t otherwise be useful. Of course, every network is unique.