There are cons to tanks that hold larger amounts. When you fill it you better be prepared to like it, because it takes a LONG time to run out. Unless you have a couple pv's to rotate between you're stuck with one flavor. . . That said, I'm loving the 510 tank cartomizer from Madvapes. My ego T tank held about 1 ml and it lasted me 24 hours, talk about an all day vape. Can't tell how long this one will last before needing a refill!