I had an e-cigarette for 1 or 2 years which I used almost exclusively. The benefits were big but charging, changing filter/liquid, buying liquid was a lot of ef

I had an e-cigarette for 1 or 2 years which I used almost exclusively. The benefits were big but charging, changing filter/liquid, buying liquid was a lot of effort. But at some point I had a burning sensation, actually the "smoke" felt really hot already when entering my mouth. I'm quite sure these were technical difficulties because I had a cheap replacement device as I lost the old one. Anyhow, I also had slight pain in my lungs if I remember correctly. It seems like a very immature technology and I doubt that it is in general dangerous as I know several people that used heavily customized e-cigarettes with self-made liquids for years. The sensation is almost relaxing when using this combination. (Of course these people had become experts on this topic.) But honestly, if one feels pain with anything one should probably stop doing it. (Same with cigarettes, if one feels respiratory problems one should at least pause it. A former boss of mine had that sometimes so he only smoked seldomly and sometimes does pauses of half a year or so. He must be now 60 or so but he's always far away from being a regular smoker.)