Just got my DNA40 closeout today. I would say vaporshark is definitely putting glitchy boards in these and dumping them even though they are saying they are not. I'm OK with that because I knew that in buying one I would get a glitchy board. The board works fine besides the display and it does reset within a reasonable amount of time. Plus the screen is on the bottom LOL! The device itself is great, not sure how they crammed an 18650 in there. They did add a disclaimer the the site that said these may glitch and they are untested but its funny that they say you can remove the batteries to reset it even though this is a mod with a built in battery.