I had really just been interested in the Purple-Days vape as a better portable option than my Vapolution (temp control is getting flakey), since it has the same 12V design and is smaller (coke can size). But to my delight I discovered it was also much easier to use and provided bigger vapor hits than I had thought possible with such a small bowl. It uses a stainless steel heat exchanger with fins (for more surface area), so it has a huge heat reserve to provide consistent vapor hits. The exchanger acts as a buffer for the ceramic heater, so while most heating elements get slammed pretty hard by big draws, this one just cruises while the exchanger holds the temp steady. I love my SSV, but if I could only have one vape, this would be it.