This rba is better than kayfun and taifun gta..I know that's saying a lot but I own all three and for the price alone the fogger tops the other 2..flavor and vapor without modification also tops them..as far as tanks go I honestly think this is the best it's more like what the aqua should have been..it does take characteristics from All of them and the outcome is what I believe the best authentic available..I would buy several of these before a kayfun and still pay less and get a better vape I payed 29.95 shipped off ebay..check it out wick it like a kayfun once you get the coils right because they aren't the easiest..