Forgetting the Lawrence mishaps, and about the craftsmanship of the manufacturer workers I had basically a few problems, one already mentioned by
Currawong, the not so clean board.
Here is a picture of my ZERO board when I removed it to upgrade some caps:
Not the best picture (unfocused) but you can clearly see flux all over the board, basically they do not clean after working on the board.
I also found one component leg that was too big (poorly cut) on the back. And also some solder here an there on the board.
So, I had to do a fair bit of cleaning to make sure the board was somewhat close to my standards, within reason of course.
Then, I ZERO would disconnect and connect at will (lose of power), and every movement I made to the casing would cause this also, I noticed that when this happened some "sparks" could be seen on the IEC inlet, so, the inlet was clearly faulty, purchased a new one (3 bucks) and fitted the new one, no problems since then!
The ZERO is a very nice unit, no doubt about it, but the manufacturing standards are clearly loose or completely missing.