I've had it for three months now. I've only ever used a Subtank Mini, and a RDA before this. IMHO this tank, in all, is real nice. Easy to build, great wide open air flow. Can really chuck clouds if you want it to. Some dry hits, maybe 2-3 a weeks, really random occurances. I've not had many struggles top filling. I loosen the tank up-off the Juice Control Ring and "righty tighty" it closed. Having clean hands and/or t-shirt dry'em and "lefty Loosey" the top cap off. Fill and reverse your order until JCR is open. It does take a bit of a maticulas routine, but I rarely struggle.
Really the only thing I am struggling with is flavor. Sweet, Fruity, Sour, spices and some of the lighter cream/milk flavors do come through, though a bit muted. Any custard, carmel, butter and Vanilla notes are missing. I DIY juice and have solid coil building skills so I've danced up and down all the options that those allow. The only two things that I can say helped were; decreasing my VG % to 50% and building 2mm spaced coils. Better, but not good. I'm curious how others are getting "great" flavor. I'm still taking respets with my Subtank Mini. My juices just burst on all levels. Maybe I'm comparing two different beasts here. I mean Raspberry Lemonade in my Cthulhu v2 is amazing. Large, cool clouds of Fresh Sweet Sour Lemon, but put a Carmel Custard in it and ..flat.. :/