I successfully completed setup with the Particle Photon wifi dev kit and 433MHz transmitter/receiver. I'm currently controlling Etekcity outlets and Belkin Conserve power strip. Only tricky part during setup was getting the receiver to recognize signals for actions, and to show up on the development web service interface. I had to try different positions of remote, sometimes getting very close to the receiver for it to recognize the signals. Maybe due to some of the interference and noise issues that were described with the other prototypes.
I have two types of IFTTT recipes setup so far. I connected Amazon Echo triggers to turn on/off based on voice command to Alexa (she says IFTTT funny) which triggers the maker channel to send a web request to the URL listed on the web service interface. I also setup location based triggers to turn on/off based on entering/exiting an area (my home).
I am using it to manage power drains from standby power (so-called energy vampires) to reduce power consumption. So far I have the RF controlled outlets / power strip for most electronics located near my computer desk at home. the amazon echo is also near the computer. I have monitors, stereo receiver, subwoofer, etc. hooked up to the RF controlled outlets. After turning off those items, the Kill-a-watt meter shows 60W decrease, which isn't that much, maybe save up to $20/year, although reduces heat output of the devices, maybe extending the life.
I also want to do some automatic lighting based on time, location, and weather triggers. I haven't tested out the signal range of the beta kit prototype, but I think that I might need to get another kit to cover an area much further away or wait until the production version is available