Hi.. well several things. Ive had 2 that just stop charging ENOUGH to be able to get good performance from them, so even when theyve charged for 10 hours or so when you drag it feels like theure just about ready to die, hardly any pull at all.
A couple the charging ports have collapsed in on themselves but tye last one was the true star of the lot.. started giving me electric shocks and high pitched noises coming from it when in use so i binnes that one ASAP! Genuine fear there that it would explode sooner or later !
My new one.. is tye alien baby, as stated and im getting on fine with it mostly its just tue coil had burned out in 2 days.. im using a 30/70 mix juice .. now.. as i said im a TOTAL noob. I know ZERO about wattage, ohms, coils, etc. This one has the screen.. i know its set to 40 watts and the rest is all absolute greek to me