The TH is completely unique due to the sourness, on the standard 5 scale I'd rate it a 4.5, once it's aged I'm sure it will get better, as it's already getting a better taste and TH. Upon first vape it was a sour apple Jolly Rancher to the tee. As of today it's starting to taste more like a crisp/cold Granny Smith with a kick. The kick as being a bit more sour than your avg GS, almost to 2x. Great for me. I'm not sure if the sweetner makes a differance, but I don't think I want to find out either, it's just perfect as is for now Geoff hit the nail on the head for this Granny Smith lover.