I purchased one of these about 2 months ago on Amaz@n to reboot the rig after several (failed-to-auto-reboot) crashes when I was away from home. Works really well, no random switching on and off as some reviewers on Amaz@n mentioned. My one is in direct line-of-sight of the wifi router. I can turn on and off the rig remotely via Internet with a downloadable app for Apple/Android. This model also has power consumption stats. Rock solid so far. Very useful if you have a rig that waits for you to leave the house then immediately crashes
The (phone) app is basic but does what it says on the tin (be a bit careful, it is quite easy to turn it off accidentally when the app it open).
Disclaimer: I dont work for tp-link and I have no affiliation with them.