The problems that plagues most, if not all of the atty's/cartos, are the crappy factory coils and small diameter wicks. This is one of the main reasons that RBA's are so popular now. If the coils were heavier gauge kanthal with larger diameter silica this would be a major improvement. I rebuild coils all the time but would rather not have to. I just want to enjoy vaping as hassle free as possible. How about factory made micro or nano coils with replaceable cotton wicks? Also, some type of adjustable airflow would be a big help. I would gladly pay a little more for the convenience. Just food for thought...