The tobacco is my favorite flavor cartridge. It is very similar to a cigarette flavor although far more subtle. The 16mg cartridges can make you cough but isn't as strong as real tobacco as it's missing 10,000 carcinogens that make you cough(as well as the cancer that eventually follows that cough)

Additionally I have tried the top two rated tobacco flavored E-liquids but still prefer these cartridges from Volcano to the E-Liquids I have tried. For the money I personally don't see much benefit to refilling your own cartridges as the savings are so minute it's insignificant.