Hi,
It works with an external monitor plus HDMI(or with LapTop) but as i have to climb in the mountains with big slopes i'm searching to use my smartphone to avoid extra weight( just 8 kg face 60 ° slopes is just...tiring)...
I've got 7D Canon and Dslr Remote Control or Camera Pro Control are well working with USB..Sony remain a special case.
With wifi, it works but too much manipulations to do, lagging time to high and so on...