I didn't find an issue with leaking but with reviewing tanks all the time i must admit most tanks i don't use that often after testing because i'm busy using other tanks that i am reviewing. There does seem to be a few mentioning leaking issues, what is still very much in the memory bank is what excellent flavour the tank gave i would use it more by choice but personally prefer single coils.Just bought one of these yesterday liking it so far, but i've been getting drops of juice coming out from the bottom of the bubble tank (basically in the crack between the glass and tank), only "leaks" if i turn the juice flow or airflow rings otherwise it's a great vape for me with 2 stainless coils