Other than the bottle, I agree. The first one I bought worked, but very poorly. I put a cable tie on the top of the tube and it went from very poor to just poor. I didn't have any thing to seal the cap with, so I tried a SS FIB and... JOY!
The second one, the bottle didn't squonk at all. I had more FIBs by then so I didn't mess with it at all.
I've got another one coming along with some grommets and HCigar bottles that should be here by the end of the week. My theory is that with a softer bottle it will work well, maybe even without the grommets. I think the supplied bottle is so stiff that it distorts, and you have to push so hard it goes right to leaking air before the juice gets into the atty. I'll also have more FIBs from Reosmods by then, which is probably what I'm going to actually use, but I want to satisfy my curiosity.
With a good bottle these are my favorite mods, better than my Peko, REO clone, or Coppervapes.