Being pretty new to this, and so far just trying different atty's & coil strengths, I've been pretty satisfied. However, I got some organic cotton the other day, and took a shot at changing some used Kanger coils to cotton wicks today. What a difference! Stronger flavor, and waaaay more vapor. I totally screwed up an Aspire BDC, but I can try again another day, or may have to wait to change them to single coils when I get to that stage of my learning experience.