Rosanne here from Richfield Ohio. I've only been on e cigs for a week, but am happy to say I've been cigarette free for the whole time. I was a 1 1/2 pack a day smoker for 36 years. I purchased the firelight which has worked pretty well for me although I just ordered the 510 for my husband as I think it will better suit his needs. I've read on these forums that the firelight and the M401 are the same cigarette and I was wondering if anyone knows if you can use the 401 cartridges on the firelight. I also found a pass through charger for the 401 that I wanted to purchase as I am on the computer a lot. I know the 401 has a male thread on the battery and female on the atty as does the firelight. Would appreciate any info you might have. 
