Today is my 1st day using the VK and I have to say I LOVE IT! I do however have a few questions. 1st, does anyone know what cartomizer flavor is the closest to marlboro reds? I got the Cowboys and it seems pretty close but wasn't sure if this was the one or if there is another. Also, how do I know when to change the cartomizer? I don't want to waste any of it. I read somewhere that the smoke would be gone when it was time to change it. Just want to make sure I am using it to the fullest. Thank you so much in advance!!!