Well, I have been using 510 atties for close to 6 months and gave the cartos a shot about a month ago... the throat hit is VERY nice at the beginning, Vapor Production is sub par (compared to the 510 anyway) and flavor is very nice. For me I guess I am just a 510 fan, and always will be. In 6 months I have tossed a total of 3 atties away and mainly because I felt it was time... I have yet to have a 510 run cold *knocks on wood*. I do only run them at 3.7 too...
I would have to say that no matter the preference in Atties... the driving power behind them is the real issue and were all winners with the Chuck!