I am using the Boge 510 soft cap cartomizers on my standard Ego battery. So far they are handling business. Great pull, solid vap with a PG juice and the quantity of vap is spot on to an analog for me. My standard pull is about 3 to 4 seconds but once you get the hang of it my experience is that it is identical to an analog without the nasty taste and smell. I was DD'ing for a week and it was just to time consuming. My soft cap Boges have eliminated that problem.