I know there is a lot of hate for the blu (maybe hate is too strong?), so I thought I'd post my little review. First, I really do like the size. For me coming off analogs, it helps to have something similar in size and shape. When I put a new cart on, I do sometimes have a problem with leaking. After I put the cart on and twist, I check for foil. I really do think it's better to remove the foil first, because it does smash the foil up into the cart where it's impossible to remove without a paperclip or something. I've been using the tobacco cart, and it doesn't have a lot of flavor, but it does the job. I have noticed that I get a stronger flavor if I pull the cart filling down a little before I stick it on the atty. While it doesn't put out plumes of vapor, I feel like it puts out almost as much as I was getting smoking Marlboro Ultra Lights. I do plan on upgrading and doing some mods, but for now, the blu is doing the job!