Access via WLAN (if one is on the same network) sometimes goes (recommendation from Belkin, quit and restart app, smartphone (IOS) completely off and restart).
Remote access via the Internet went once and then never again (recommendation Belkin, reset everything, all over again ...).
(Then you can also, as always, go to switch.)
This is technologically unacceptable and especially not mature.
The best for last!
The wemo app for smartphones provides the function: "Tell us what you think"
If one uses to get in touch and tell the required opinion or to get help, you will receive a "Do not Reply message" from the postmaster (at) belkin.com in you get notified that the email address that you used does not exist.