As I only just got mine today, I cannot give you any 'long term' feedback but what I can say is that (IMHO) it is a huge step up from the short wick ones! I love, love, LOVE the fact that I am not having to constantly tip the darn thing. Getting great vapor, TH and flavor coming
through. I have a caramel apple in there right now and really enjoying it. My problem with the SD's has been that every single one in the past has quickly (within a day or two) started leaking from the battery end. User error of some sort I am sure but darned if I know what it is. Anyway i will be watching for this. If it happens again, it's the last one I try but, for ease of use and production, if you liked the other SD's, I think you will be very happy with this one.