First, let me say that I have had a horrible time with all the premium cartos I have tried (from various vendors). Poor wicking, burning super-hot, poor liquid absorption, etc.I went through about 20 brand-new blanks in less than two weeks, some of them DOA or having to be tossed after one fill. I was very, very frustrated. Mark kindly sent me some of the newest premium cartos (the caps are different, but I don't know what they are called because I can't keep track of all the different types of V4L cartos
). So far, I can tell that these are far superior to any carto I have ever used, premium or otherwise. They absorb liquid exceptionally well, which means they wick exceptionally well, and they last a good long time without getting too hot. I'm very pleased with these new premiums! 