I have three of them, and they are set up as Genesis style with SS 375 Mesh and 32 g Kanthal wire to read around 2.7 ohms. I plug the fill hole. As far as vaping is concerned, they are great. The only issue seems to be with juice coming out of the air hole which I align with the wick. On some my PV's (VV's of all types), the air hole/wick align opposite the firing button, and I do not have any problems since I like my button on the bottom. On others, juice drips out when the wick/air hole is facing downwards. My assumption is that there is juice condensate which collects inside the top cap and flows out if the device is tilted with the hole facing down. I could learn to vape with the hole up, but as the juice starts to empty, the wick is not immersed in juice and the vape quality starts to go down. I was thinking of drilling a hole in the top near the tip and plugging the original air hole. Has anyone tried this or had a similar problem?