Just got done watching JJ's clean tank video..the tanks look nice..im sure they vape well..but what justifys the 69$-79$ price tag? I would understand if it had a hybrid carto..somthing new..or if it was a HH. 357 atomizer tank..other then the fact that its alot neater to refill or clean the tank of the 2 peice duo nothings changed. And he says this tank isnt for novices??? Why are these tanks not for novices other then the fact novices wont usualy pay 79$ for a tank? He says theres a learning curve, can someone please explain what this "learning curve" is with either of these tanks???? It seems to me just from watching the video that its the same thing as every other tank..just a little bit nicer. I own a few HH 357s and i totally understand the "learning curve" with those and ill spend the 25$ everytime without a 2nd thought they are amazing. But a learning curve with the Parva clean tank or the Duo clean tank...just confuses me...i think these tanks are just as much for novices as they are for anyone else, theres nothing to it.