My fourth and final WeMo down the hall from my room worked for about an hour after initial setup (just like the one blocked by the nightstand), and then ceased to connect to my WiFi. This WeMo sometimes works and sometimes doesn't. My third WeMo has direct line-of-sight partially blocked by two computer towers. The WeMo behind the nightstand seemed okay for up to 1 hour after initial setup, but then was no longer able to maintain connection to my WiFi. The WeMo with the clear shot always behaves. One has a clear shot, the other is behind a small Nightstand. Two of the WeMos are directly across my Bedroom from the Router. Now that the setup is clear, I'd really love to inform all of you that only one of these 4 WeMos can reliably connect to my router (again, 3 of my WeMos reside in the same room as my router). My router can blast a 100Mbps connection throughout both floors of my house and even maintain a connection out on the street - that's how strong my router is. It is definitely worth mentioning that I have an absolutely beastly router. My intended use case was to use them to power lamps (very standard use case). The fourth and final WeMo was installed in a room just down the hall from me (also on the second floor) along with another Echo Dot. I also have an Echo Dot in my room, next to my Router. Specifically, my router is in our Master Bedroom, as are 3 of the 4 WeMo smart plugs. Our router is also on the second floor (this is important, as 'smart' devices all need to connect to WiFi to communicate). All 4 were put to use on our second floor.

Wemo smart switch