If all I had to vape were my old Kayfun Lite Plus V2's I'd be a happy guy. I have a stack of atomizers and still vape the Kayfun as much as any other tank I have. I'm finally starting to like my 24mm Ares, Siren 2, and Beserker and those may begin to edge out the Kayfuns. There's a lot to be said for a short tank that does 4.5ml with good flavor and fits in a pocket without leaking. The above RTA's fit that description. The cloud era took over for the last few years and it was hard to find new MTL tanks that really worked. Most of them were free air flow with incidental MTL capabilities. It's good to see some manufacturers coming back to supply the MTL vapers that started this entire industry.