Never used them. It looks like the have real Kanger KR808D-1. I would not
buy juices or prefilled cartos there - it's Chinese Dekang stuff based on the flavor names (DK-Tab, USA Mix) , probably the 100% PG. Nice selection of blank cartos. I usually
buy my blank cartos at LiteCigUSA,net where the shipping is under $3. I don't know what Vapor Heaven's shipping is.