I am in such devices as well as the power consumption in standby is very important. And here I was really impressed.
After the first power consumption of 1.5W was within a few minutes down to 0.1W and eventually all the way down. (My power meter has a resolution of 1 mW.)
This is absolutely exemplary and can be plugged in the device safely. It is also not even lukewarm when loading at full load. I therefore make it disappear behind the cabinet, on which the devices are loaded and look up only the micro and mini USB cable or the dock out. So I had wished for.
Function: ++
Energy consumption: ++
Handling and fit to travel awareness: + (traveling would be a shorter circuit cable nice)
If it holds still long I did not know what you could do really better.