So I recieved my VK Ultimate Ultimatum package on saturday. I really liked the vapor king but I was not a big fan of the flavors I ordered. I got some Mboro 16, French Pipe 16 and RY-4 16's and to be honest I didn't really like any of the flavors and was kicking myself because I didn't get stronger cartomizers. So today I recieved my first shipment of refills. I got Red Cow 24 which I have to say I love, some coffee 36 which is good and cappuccino 36. I also ordered some nobacco juice, grape, cola, green apple and Mboro. I'm very happy with these flavors and everyone who told me I prob would like flavors other than tobacco flavors was right!! I am very excited to really try and go a full day without any analogs, who know maybe even a whole week! Thanks so much Steve! My only question is how do you know when the cartomizers are empy, do they just stop creating vapor all together? Also is it ok to say refill a Mboro cartomizer with grape nobacco juice, or any other combination?