So what did you buy? The VF?
I haven't yet, as black with usb not in yet, but was told they are meant to get the black usb flask next week, and yes planning to get one, have no interest in the TC, but you know how long my other flask lasted, and these Kangxin flasks seems to be getting good reviews and not seen hardly any issues with them, and guess the TC will be there if want to try it at some point.