I played with the WeMo Light Switches in the house last night. They are really easy to install. I am a real tech geek, but I have always been a little afraid of electricity. I think something must have happened when I was a kid. I do not remember what exactly happened. But from a child's perspective I remember a "fist" coming out of an electrical socket and hitting me as hard as it could. It's weird but I can still see it in my head (even though it was 45 years ago or more). Anyway enough with the scary electrical fist stories. I was able to install the first switch, set it up, get it running, redo it to make it look better (I know OCD problem) and then somehow shut it down and lock it so that it would not work at all in about 45 minutes. It probably took me that long to figure out how to unlock the thing and get it back on. In case you were wondering, holding down the switch for 30 seconds does not reset it, but instead, turns the wifi off. You have to do the same thing to get it back on.
The first thing the switch will want to do is update firmware. I let the first one do it. The next two, I told them to wait thinking that they would all upgrade at the same time if I waited until the end. But no, it is an individual thing. So go ahead and do it after each switch.
Also, I think the firmware may have outpaced the documentation. The documentation makes it appear that you can send texts to the light to turn them on and off, but have no direct connection to the switch without a wifi connection. However, I found that if you linked the lights to the online IFTTT service, then you can control each light through the cell phone without any wifi while out of the house. I am sure that someone walking past our house last night probably thought we had a short or something because I kept just turning the outside lights on and off from the couch (some with wifi on and some with wifi on my phone turned off, then with the wifi on again but on a different network). Then I had to repeat the whole process with my iPad. You get the picture. This morning I was in the garage turning off the wifi on my cell phone and watching the lights outside the garage go on and off at my command. Fun toy.