Hey guys. I got my ZNA Clone from VapersMark yesterday (black tube, Copper body) and I can say, it's nice. The body is a nice rose gold (not copper like most mods, softer almost metallic pink) and the tubes are black chrome. Build quality is excellent, threading is great (big, chunky Z2 threading, so legit Zen/HoH tubes, caps, buttons should fit). The tubes are definitely SS as they are quite hefty, and overall the device has a nice, quality feel heft to it.
So, on to issues I've seen...
Several smooth, flat bottomed RDAs (Mephisto, Pyrro, Vulcan) and an Aerotank Mega have had minor issues with getting stuck on the top cap as it is also flat (slight moisture after cleaning, or a drop of juice makes a great seal between the two surfaces) which isn't a deal breaker, but don't be surprised if this happens. I have seen some minor resistance fluctuation which is common with the cloudpour DNA boards (I have 4 Chanas), which is also not a deal breaker, just be aware. There is a boot time after the device goes to sleep, which is quite quickly, so it does take a second to wake before firing (if this is a deal breaker for you, and I know it is for some people, not myself, then this is as much as you need to know, move along). The only other issue I've had is that the spring in the bottom cap is HUGE and quite long, so in my experience, with Samsung 22r and Efest Purple 35a 18650s as well as Purple Efest 18500 10a, due to the spring stiffness and length, you will have a gap at the bottom, between the tube and the cap of about 1mm. I've tried twisting the spring and pressing it down with pliers to see if I can get it to go into the recess on the cap, essentially adjusting the negative contact as it sticks up too far causing the gap, and the positive screw can't be adjusted. I may just replace or make a new spring.
So, that being said, should you buy one? If you read the above and are ok with those things, absolutely. If those things are going to drive you crazy, and you're not willing to fix or deal with minor annoyances? Then probably not.
Overall I am very happy with the device, as with most all clones, and authentics, they aren't flawless, but if you don't mind a little tinkering (that's what vaping is all about right?) these are fantastic devices, and VapersMark seems to know what they are doing.
That is all.