I recently bought 3 together, I’ve used them for about 3 weeks, my findings so far 1. KF lite 2019...least hassle of all 10/10, flavour lovely, perfect. 2. True MTL...nice tight draw, no hassle, but flavour not quite there yet 8.5/10 3. KF Prime...most hassle, pissing about with juice control, messing about with airflow, arggg. Not giving up yet, but early impressions are it’s over complicating things in comparison to others.