Well, I've had only 5 hits off it. When I took it all out of the box and put it together, the cartridge I took out of cello wrapper was wet on the outside, so wiped it down. I was expecting empty carts. I have no idea what they are loaded with, but there was 0 flavor, 0 TH, and I'd say medium vapor. I felt a little sting on my tongue, and a little light headed. I ordered some empty carts and will try to figure out how to load them with some liquid I ordered and try that. I need to figure out how to empty and clean the carts that came with it. I would be interested in any comments on this. Thanks.