I bought two WeMo insight outlet/switches to try out in "mission critical" applications. The results are not promising.
I plugged one into a wine a/c unit that has to keep a room at below 60 consistently. And one on a critical sump pump that has to always be available when any significant rain occurs, to avoid a flooded finish basement.
1. Both WeMo units spontaneously turned OFF this morning at 4am. My guess is that it was related to a rain storm which included a couple of thunderclaps within some minutes of when the WeMo units reported stopping running. Although this was a modest storm and certainly none of the lightning/thunder seemed close, the fact that both units defaulted to OFF, when they were both supposed to be ON, points to some super-sensitivity of these WeMo units. Nothing else in the building was affected.
So, on this alone, I have to abandon my trial, since I cannot have something turning off these machines permanently without my knowing. Once I noticed the problem and turned the WeMo units on, the pump and a/c unit came on easily enough, but this amounts to zero reliability.
2. Notifications of the rules I had established seemed to be erratic. I would be getting notices consistently every few minutes when a device turned on or off or was on for x amount of time, but then the notices would stop for hours on end, even though the units were running many times an hour.
3. The wattages being reported as used were suspect. a) the a/c unit, which the manufacturer told me yesterday runs between 900-1000 watts consistently when each unit leaves the factory, was reported by Wemo as being about 740 watts. So, probably a 20% or so error, presumably. b) the sump pump was only running for 15 second intervals every 5-8 minutes, and even though it is a 1/3 hp pump, the daily report is saying that it is using 0.003 kilowatt hours per half hour. Which if I do the math right, means it is using .003 x 1000 = 3.0 watts / half hour or 6.0 watts per hour. Waaaa? A large pump that is turning on 10 times an hour and shooting many gallons of water up a 10 ft pipe each time, used only a few watts in the entire hour. I may have almost discovered a perpetual motion machine -- though I think not.
So, maybe I can use these devices to turn on and off a couple of lights, but not for anything I really need to depend on.