I want the only limits to my experience to be my own knowledge. While I understand there are risks associated with this mentality, I have approached them cautiously.
More in commiseration than advice cause I'm new at this too. Reading the whole thread I find Pegasus's advice most applicable to the situation at hand (yours and mine), because she/he provides a very good picture of how imperfect the wares being sold are and how fluid their evolution is.
Like you I'm just beginning to experiment which, as you've already hinted, means I am learning as much as I can about battery safety. That world too is quickly evolving, so don't go sub-ohm without first appreciating why so many prefer Sony batteries.
The note on safety over, I move to what I've learned so far about the goods out there.
Clones are the brainchildren of mechanical imbeciles and marketing geniuses created for the sole purpose of separating suckers like me (I include no one else in the category) and their money. The comment you most hear about most clones is 'for that amount of money you can't complain'. Well I do. If you want to avoid intrinsic, and often intelligence insulting, limitations in what you buy, then avoid clones. They are by definition defective goods masquerading as superior ones. For example, I have a Trident clone with the famous slotted posts that supposedly make rebuilding so much easier which I bought from a reputable retailer in US. Thanks but give me the eye straining pinholes any day. In comparison to the positive, the negative posts on my Trident are so low that for my coil to sit properly I not only find the slots useless but a pain to work with. You get what you pay for.
I also have an IGO-W. Good atomizer for the price, which means I had to widen one hole and drill an extra one as I began building lower resistance, not necessarily sub-ohm, coils. It functions well enough for coils above 1.2 ohms, but the walls are just too thin for sub-ohm coils and the atomizer becomes uncomfortably hot. The solution is of course to widen the existing holes. But isn't that another limitation piggybacked on the back of a first?
Today I sprung for an Atomic. I'm sure it too will have its limitations, I just hope these are not so big as to make me feel like a sucker for buying the damn thing.