Just got the Mydmx Go - been looking at it for a while.
I have updated the firmware, checked that my Android tablet has the correct version operating system (4.4.2 which according to the manual seems to be enough) - I've then plugged all the lights in and opened up the App.
I can load up the fixtures ok and have set the DMX addresses correctly.
My tablet says that it has connected to the appropriate wireless network, but the WIFI light on the box is flashing quickly - only one light is cycling through a built in program and nothing else is working at all.
Hope you can save this unit from being returned.