To use nicotine salt or to use freebase nicotine. If you want to vape a very high level of nicotine in concentrations of 30mg/mp or higher, then it is of utmost importance that you keep your wattages low and coil resistance should be higher than 1ohm. This applies no matter which form of nicotine you are using. Freebase most likely will be harsher when used in this fashion and that is why salt nic is more useful in this scenario. Most of the hoopla about nicotine salts is overrated. I like nicotine salts for the fact that they do not oxidize as easily and storage life is somewhat extended. My statements on this matter are the result of personal experience and should by no means be interpreted as scientific fact. It is my belief that my statements, though, are valid. I hope that this info will be helpful for anyone considering using nicotine salts. At high levels, nic salt can be used without excessive throat irritation versus freebase nic at these same levels. At low levels, i really cant say that i can tell a difference between the two.