Well, I started with a fixed 900mah and a cartitank... that was not doing it... kept going back to analogs, then I got an Iclear 30s combined with the 900mah pass through and that worked... but as some others have touched on, I had to figure out the Juice..! And, if an experienced vaper had told me to start with the MVP or anything else... I dont think I would have followed.. I needed to stumble, and I'm still new so I will stumble some more... What an awesome journey..! Would have never sat here talking about what analog Is my fav... lol