Janet,
I smoke e-puffer cigs, and you are right, their liquid is very expensive. I had been smoking their high nicotine carts & refilled with their low nicotine menthol liquid. I promptly developed an irritated & sore
throat. Thought I might just be getting sick, but no, when I switched back to the new carts my
throat felt fine.
There is something about e-puffer menthol liquid which seems very strong & irritating, even in the low nicotine version. Don't know if it is just the menthol version or all flavors. My advice would be to save some money & try to find liquid elsewhere. On all other products though, I have found e-puffer to be a very classy, reliable supplier. Great customer support. It just takes a few days extra for the Canada mail system to get in gear.