And I second getting a coolfire4. It's my backup to my 50W Istick. I gave my 30 to my brother so he could try to quit smoking with vaping for the 100th time. It's a solid device and works great. Only downside is the battery life. Which I find weird that they didn't go with 2 cells in there since the coolfire is actually around the same size as the 50w istick even though it seems smaller. But I decided to give him the 30 because my subtank plus looks stupid on it and fits the coolfire like a dream.