We are using the isub g tank had no problems with it so far. Made the mistake of putting 12mg in it and it hurt haha. I have always bought 18mg nicotine in the past but I was always getting headaches so I think that's why it put me off the ecig so that's why I am on 12 and its a lot better and we have 3mg for the sub ohm but might get some 6mg to try
Thanks everyone looking forward to joining some discussions.