Just received mine yesterday. Wanted to chime in with a few thoughts as well as some questions....
The build quality on mine seems pretty good EXCEPT for the screws and holes (as previously mentioned by other owners). I lost 2 of the screws before even digging into the actual build process - a few of them slide in and out of the holes, hence why they just flew out, rather than staying screwed in. My top cap and tank screw together fine and the tank looks nice overall.
My biggest issue is LEAKING. I've been using a Kayfun for several months and at this point can build Kayfuns with ease. I cannot, for the life of me, figure out how to set this tank up without leaking. The first build I did was a 1ohm single-coil with a long wick that wrapped around the entire deck to prevent any leaking from the extra chambers/airhole. Intense leaking. I then did this again and per a suggestion I read, shoved some extra cotton to block up the extra juice channels. Lots of leaking. I then decided that perhaps the single-coil build is the issue so I built a dual-coil .6ohm setup and set it up as I would a single-coil Kayfun. Leaking everywhere. I then read how sometimes using a LOT of cotton + really plugging the juice holes (opposite of the Kayfun) is the way to go - but again, leaking.
I exclusively fill my Kayfun via the bottom fill hole, but I learned the top-fill method to fill this tank. I followed it step by step, every time, and when I finally turn the tank rightside up everything just leaks rapidly out of the airholes. I'm comfortable building coils and wicking setups, but this is giving me issues unlike anything else. Anyone have any advice? Perhaps someone is having the same issue and has been able to solve it? Perhaps it's even my top-fill method, so if someone can point me to a foolproof guide on that I'm willing to give it a shot!
Final Verdict: My Kayfun clone has never given me close to as much trouble in the 3+ months I've had it than this has in 1 night. So there's that....