Anyone had any experience with Energenie products or other power saving devices?

These look very interesting:

https://energenie4u.co.uk/catalogue/cate…ccessories

and I was wondering whether anyone had any experience with them.

I currently have a Raspberry Pi2 in my living room, along with my 40″ LED, A/V amp and subwoofer.

I am trying to find a way whereby when the Pi goes into screen savermode, it cuts power to all the other peripherals.