Hello ECF. I love cartomizers. However, out of all cartomizers I have came across, clouds of vapor has sustained great attention from me when he introduced these things as "REnew" cartomizers. I had no idea what was the difference other than letting me know it makes "clouds of vapor" but upon further detail I had discussed with him, they actually do much more than that. Here's why: First, it is an 1.7ohms and works just as good as a 5v. They offer a nice punch flavor, heavy clouds and I mean heavy enough to cover my face, and most of all, decent amount of throat hit with no burning sensation. The only thing I didn't like is these last less than a week (5 days tops at times or more), and it kills me with such technology today if only these would last longer. None the less, I love it.