I just got this tank earlier this morning. I think this is a wonderful tank thus far. I filled it this morning and still going. At 4.5ml tank capacity I think it's safe to assume it's an all day subohm tank with no refilling. I like what you get in the package. The options for this tank are amazing. I mean come on. I can vape with a 1.2ohm coil, or sub ohm with a 0.5ohm coil, and to top it off. When I'm ready to do rebuilding, bam! It comes with a RBA and to 0.5ohm coils plus cotton for the RBA! An amazing offer for such an amazing low price. I will probably write a full review after I get a week in with this tank. So far, no problems!