I have two MiniMads and I've noticed both of them require restarts every couple of days. Output simply stops. I have midi controllers connected to both units (microModul8) and their LEDs light up as if the Minimad is still stepping through my sequences, but output eventually stops - without any change to the physical cabling or power. Restarting the MiniMad always fixes it, though with a 30-second startup time.
I've encountered this issue when the MiniMads are configured for MadLight (DMX/Artnet), but have yet to try it for media on a projector. So this may be specific to MadLight.
It isn't a big deal for my use case but it may be for yours. I've never seen it fail in the first 24 hours.