I have the TP-LINK HS-110 and the Belkin Wemo Insight.
I think the HS-110 is the better choice as the Wemo defaults to off after a power outage.
There are 3 versions of the HS-110, V1, V2, & V3. V3 is set up Europe. The V1 and V2 are for the US. The V2 is more current than the V1, but seems hard to get. My V2 arrives next week. I had to go through support to get it. Amazon only has the V1.
The V2 has a limit of 3.68kW. I notice our clothes dryer consumes 5.75kW… The V1 can go to 1.8kW at 120V.
The V1 suggests you upgrade the firmware when you install it. That is very important as you get bogus numbers out of the box.
The numbers vary a bit between the HS-110, Wemo, and Sense, but they are close.
You can get real time data from all three but it takes some programming. HS-110 and Wemo granularity is 1s. Sense is .5s. The Sense real time data does not seem to be as reliable as the downloadable hourly data. Their patent says they do more extensive processing on the hourly data.