I'll play, here's mine
Stainless Steel w/o extra chips
My hopper performed erratically the first few weeks I had it, in every way- vapor production with same strain/tamp/technique, battery life (abysmal), blue lights flickering on full cell.. there was no consistency, performance ranged from beastly vapor production to wispy under the same conditions with fresh cells. I experienced the hot back end consistently.
I decided to delay warranty service and watched this thread with keen interest. A few weeks in the unit decided to turn itself on upon contact with a fresh cell and heat up and was unresponsive to the button to turn off. I took the battery out and that was the last straw, went through with warranty. I was hoping for a back end swap but was told to send in entire unit.
I thought the diagnosis should clearly show something amiss so I was pretty surprised when I was told they could find zero issues, including hot back end. I'd be willing to accept that the other event was a one off but the back end heat was consistent.
I expressed some doubt but was gracious, even through it being suggested that perhaps I was not tightening the threads fully. That was kind of funny and frustrating at the same time; I reminded myself they deal with lot's of different people of different skill sets and have no way of knowing mine.
I was told they would test again and if I heard nothing further that it had passed and was on it's way home.
Upon arrival, I could see that the body had been scratched up by the clip, something I had taken pains to avoid. Annoying. Whatever. Loaded her up, popped in a fresh cell... and immediately the fucking thing powers up on it's own, again! This time it turned itself off after about three seconds after the blue lights. Popped in cell two, same goddamn thing. Battery three it decides to act "normal". Put battery two back in, now it too is "normal". It's like when one takes their car to the shop and the issue can't be replicated- or the techs are inept, I have no way of knowing.
Immediately request warranty service, this time I'm a little less gracious and convey in no uncertain terms that the threads are, and were, fully tightened. Over a week goes by with nothing, I saw similar reports here on this thread so I waited patiently. Eight days in I get an email that I will be shipped a replacement back end.
Received new back end, appears identical to old. First use things were not "normal" but in the best of ways! Cool back end, solid blue lights at full charge, drastically improved battery. Level four is comparable to old level five, my best guess. Fuck yea.
My pcb is a hot mess in comparison to some others I've seen, yet my issues seem to have resided solely with the back end. Seems it was shorting consistently causing all said problems.
I hope those with clear issues can get it sorted out, it really sucks. I can't imagine how frustrated I'd be if it was my sole vape or dd. I still don't quite fully trust it but I now understand all the praise for this device much better than I did, initially. I look forward to being able to use it for what I purchased it for, primarily being super stealth while in the wild plus one and done monster rips through glass.
Hope everyone's having a great weekend and are as vaped as their hearts desire!