I couldn't agree more. These are the tanks I run, I prefer the larger of the two for a few reasons. 1st : I don't have to fill it as often. 2nd : imo, because it's bigger the increased volume of liquid helps pressure juice into the hole in the carto. Also I've tried a few different cartos and I believe the single hole is better than two smaller holes. I couldn't imagine running anything else that I had to tinker around with all day. These Pyrex tanks are bullet proof no leaks etc. I used to smoke 2plus packs a day and I haven't touched a cig since I got my setup. 2months. I will admit to vaping over 12ml/day. But that's another story.
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