I LOVED the atty on my pump carts, but I wasn't crazy about the carts themselves. Sometimes they worked fine (if you hold the button down while you draw on it without pushing the battery button and I also left the spongy stuff in there), and then sometimes all the juice would come out at once all over the place. I ended up just using a drip tip on mine and dripping because the flavor is phenomenal. Hands down my favorite vapor/flavor by far. The atty will burn up juice like crazy, though, so I put two drops every 3 puffs of so. Worth it. My atty lasted about a month, and I would love to buy the atty without the carts. I think badkolo said look for improved pumpcarts in Feb? I'm waiting with bated breath (while I vape my vornado cyclone dongle thingy).