Ok...after havin used these for the last couple months with my CE5s clearos...I can honestly say I hate the hell out of em...they are garbage. They fixed problems with the BDCs but intoduced more problems which are worse. They tend to last longer...but when they are done...there is no cleaning them...they must be tossed. They flood 100% of the time with 100% VG when first filled and when refilled. They are just a pain. I plan on buying a Provari in a few and will give Kanger a shot for tank/coils.