Have been using it for over 2 weeks. Love that it never leaks. I have dripped more than 20 drops sometimes, just to test its limits and it never leaks. Also thought it might gurgle, but nothing that can be inconvenient, just the first hit might be a tighter drag due to liquid blocking airholes.
As far as builds, loved it with 28g single very good flavor and vapor. Tried to close one airhole with wet cotton wad but it was worse, instead even with single coil both airholes open was the best way to go. Also tried twisted 34g Ni200 @ 0.19 with temp control. Great flavor but twisted coils spluttered too much and noisy. Initially I thought was getting ridiculously excellent flavor but took a few moments to realize that I was actually tasting
eliquid in my mouth.
Currently running dual 26g @0.3 on rDNA40 at 36W. Decent clouds and flavor and not to mention a warm vape.