I have been DIY with nic salts since I started DIY. They really just provide a smoother hit, and POSSIBLY more bioavailability. Nic River doesn't use benzoic acid in their nic salts, and they are my vendor.
The only difference with nic salts is a smoother hit, so the ability to reach high, high numbers if desired. That would be the key. If you use nic salts at your usual strength (mine is 18 mg/nl) they are just smoother, period. If one overdoes them, like regular nic, one will become nic sick, but they are 1:1 (as far as I can tell) if moving from freebase to nic salt juices. I enjoy mine, but mainly for the lack of throat hit, which is what I actively seek.
They can be used just like any other nicotine, there's no magic involved, just a slightly different process to make them smoother. You can get just as nic sick on regular nicotine if overdoing it.
Anna