Heathers NET's are a tobacco that is extracted from flavor infused tobacco. The tobacco that is used in non NET liquids are usually absolute tobacco flavoring which is VERY concentrated. Too much and the eliquid tastes nasty.
My first tobacco vape was an absolute type and I hated it. It scared me off of trying a NET for months.
Heather does an amazing job of getting the perfect blend of sweet with tobacco. They are truly delicious. The samples are ready to vape pretty much as soon as you get them. Samples only come in 70/30 and at 12mg. If you decide to get a 6ml, pop the caps and dripper tips off for a couple of days. Recap and let age for a week.
Give yourself time to really get the nuances by at least vaping a couple of ml.
My absolute favorite is Dragon's Fire.