Hello, I feel your pain man, there is a lot more info out there than I expected! I also tried the ones from 7-11 and a few other stores, my experience has been if it looks anything like a cigarette it will not be any good! I have the ego c with a clear atomizer thingy instead of what it came with (fumbling with that tank sucked). I am pretty happy with it but after reading a few threads it looks like there are better options!