I do like the flavor of the prefilled carts from N-Pro, however at 2.00 a cart they are very expensive compared with refilling. I used three a day of the prefilled to ease my 2 pack a day habit but the carts cost more then the ciggs. After buying two of the 20.00 10 pack refills, I ordered some juice. What I have found is that for every drop replaced equals about 1 cigarette in the original carts, most holding 6-8 drops, so no where near the pack each cart was said to replace.
If each prefilled cart did in fact smoke as long as a pack of ciggs or at least half, they could be an affordable alternative. If they actually represent the nic of a pack of smokes then they should have less nic to equate to the 5-8 cigarettes they represent at an equitable price. Until this happens I will be refilling myself because I am not trading One pimp for another to spend more or even as much money.