I have tried the acorn, the chibi, the saphire, and one other kind- all that suck from the bottom, or heat from the bottom, I DO like them- But the saphire is hard to replace the wick on, then it leaks, the acorn and chibi, I dont remember- leaking I think- oh wait no, it was the Ce's IN them that went bad on me- got gunky, wernt easliy cleanable, then you had to have special ones to replace etc.. PITA..
I am hell on a carto- I admit that- my pocket is my place of choice for storage, I vape ALOT, and I need something that can stand up to gunk, AND vape good, and not leak after the first refil. I dont like changing them out every day. and I DESPISE throwing them away...