I purchase 3 different types of Cartomizer to try, 1 is coming in the mail tomorrow( I hope). I was using my go-carts ( started on the go-go) on my buzz pro till the new cartomizer came. The taste and flavor was great. Today, I got my madvapes 510 XL CE2 R4 Cartomizers, 2.8-3.0 ohm first had a hard time filling( my syringe tube was the wrong size) also, I never saw anything come out of the bottom( not sure if it is supposed to). When I take a hit it is all plastic chemical taste. So I figure I will figure that one out when I get a tube that is the right size. I grabbed my smoketech 2.5 ohm single coal and filled it. On my kgo it taste ok, on my buzz pro I have no taste at all. I don't get it. Can someone give me advice or better caromizers. I have my boge coming soon.