I got my Riva 901 about 2 weeks ago and started with the attys, gave up on those, just didn't last long enough and was constantly adding juice. Tried dripping for a bit, same thing. Now I have moved to cartomizers, the 901's from Ikenvape. These last a little longer, but not much it seems, before I start having to constantly start topping off to keep going, finally get tired of messing with it and go have a smoke. I guess I'm a heavy vapor, always tugging on it, can't seem to get satisfied. Probably should up my nic strength and see if I can get to a better strength for me. But my main frustration is the constantly having to add liquid. Maybe not enough info here to go by, but if you have any suggestions, or soloutions, from similar experiences you have had, I sure would like to hear them. Thanks.