Shawn yeh those Expert 510 attys are pretty good. i am using the one i got when you first ordered them and going strong. the wick is nice and big. i am using mine at 3.7v and getting loads of vapor and a pretty good TH. ohm readings are 2.7 ohms. so if a regular 510 atty is about 2.3 and the experts are 2.7 how are the experts so much better with TH and vapor. i cant use a regular 510 atty at 3.7v at all but 6v is good. yeh im really loving these experts almost as good as the LR and dont have to worry too much to make them last. Thanks for ordering them. folks ya gotta try them you wont be sorry. but i'll tell you one thing. after all these changes i can never NEVER go back to regular 510 attys 801 attys and cartomizers ever again. these new ones rock.