i just filled the first one i got and what a pain in the ...... the center hole that needs to be pierced wouldnt pierce with my 18g blunt syringe so i had to use a needle and wiggle it back and forth to open the hole to get the syringe in. put 1.5ml in no problem, let it sit for a few minutes, tried to put another 1ml in and it just ran out the battery end. which brings me to pain in the ... problem 2. with the skirt its hard to get anything in there to wipe all the excess
juice out. i also cant look down into the cartomizer and visually check if it needs to be topped off like i can with a regular cartomizer. i think a large capacity cartomizer was a great idea, i'll stick to the regular ones until someone develops a refill method that isnt such a pain. i do LOVE the flat tip tho, cant get that on a regular carto