I hate Greensmoke and have since moved on. I am now
vaping the rest of my order ($50 in disposable Carts...about 20 carts) and I have to say, Greensmoke has improved the cart-packaging. (insert Boos and hisses here) ok ok ok ....
The new way that the pre-filled cartos are packaged is, IMHO, 1000x better than the 2 condom method they were using for every order since the last one. I would always get dried out or dripping cartos. Now, they ship consistently and the carts last me on average 4-6 hours of Heavy 6 pull marathon
vaping. I think they look like packaging for the EXTRA gum....plastic trays sealed with an aluminum backing.
I use 3 batteries for on the go and a usb passthrough for sitting @ the computer. Decent vape, flavor and 24mg nicotiene satisfaction...hey, they got me, a solid PAD smoker, off analogs. When I finally find out what ejuice is used in them and at what mix, I will finally put these expensive things in my rear-view.
Conclusion: Greensmoke is ok for a beginner, but you WILL seek a cheaper alternative once you are serious and comfortable with vaping full time.