I've used clear Fluxo's for awhile (6+ months) and the newest versions are by far the best. Better tube design (no cracking), sealed connector (no leaks), improved coils (more consistent wrapping), taller connector base (no wiggling, better seal). Nice clean flavor that's as close to dripping as you can get. I got tired of tasting filler when I vaped and these eliminate that. Gotvapes is the only vendor out there working to improve CE2's and fillerless carto's so there's always going to be 'works in progress'. They're like IKV of fillerless carto's.