Received mine yesterday, about two days from ordering. One has incompletely milled air flow channels at the battery connector making it nearly impossible to draw on. Cropduster has already said he will mail a replacement out today. So, +1 on customer service.
The other three work, but... I can't say I'm impressed by them yet. I can get about 2ml of juice in them, maybe a tad more. Draw is rather light for my taste, vapor production "meh" - no more and often less than I get from a Type A atty, tank and good technique. I want to attribute this to the lighter draw but not sure yet. I tried turning the inner batt connector/air hole by turning in a 1/2 turn at a time up to four full turns -- small improvement in draw and vapor but not much. Maybe it can be turned in more but I want to be careful. Could also be that the air channels on these are too deep, as compared to too shallow. One of them has a very slight, muted burned taste to it. Not enough to make me stop vaping what's in there, but not sure I'll refill it.
In addition to the known bad air channel on one, all of them feel "rough" when threaded on (at least as compared to my Type A attys).
So... any tips from longer-time users, something to give me a reason to love them? I haven't completely given up on them, maybe there's some trick to using them that I don't know yet... but my first impression is they rank about the middle of the range of all the cartos I've tried so far.
I bought 3. On the first one the threads and air holes are perfect and I reported a fantastic experience. However, the other 2 have incorrectly or incompletely cut threads. And as I reported before they will not work on the ego models sold by mypvshop(.)com
So...I did test them on a Joye Ego battery and they work and of course they work on a Riva battery. I just opened the other 2 today and when I found them AFU I went to cropdusters site and it appears to be inactive. No links work. Any info?