@billlokey, good question…
First off, I don’t use the smarplugs for their “switch capabilities”. I use them to measure power going to devices that Sense is not likely to ever get smart enough to completely detect. Here’s a partial list along with some analysis of the different modes these devices operate in based on their hourly power consumption.
Second, most of the plugs come from 3 HS300 powerstripas, that measure the power out of each plug.
My 2c is that it is worth investing in at least one HS110 plug to use with Sense for “exploring” usage of devices that Sense hasn’t detected yet… For example, here’s a view of my new-ish LG washing machine running through it’s cycles courtesy of an HS110 smartplug.