I actually just bought one of these. I found the forum on my search to find out if e-cigs were a sham, and was glad there is a collected place with so much info. I found in some PDF a while back that a firelight is in-fact just an m-402.
Now, with out having tried anything else...I'm pretty impressed.
One thing that surprised me, was the cartridge, I've looked through some of the modification pages, and it seems that the firelight comes...pre-modded if that can happen..haha
Instead of any kind of filler in the cart, it is sealed with foil, over a kind of loose mesh fabric. Essentially, the cart is full, except for the thin membrane over the top. They stay sealed, until the bridge punctures them when you're ready to use.
I did get some extra juice through another vendor, and have even had luck refilling them.
The battery lasts me all day, not using it a lot at once, just about 5 minutes at a time like I would normally smoke, in fact one filled cart lasts all day too. I'd approximate the time/drags of 10-12 cigs.
Anyway, if the opinion of a newbie counts, I really like them. I will have to look into another place to buy the atomizers though, as the firelight branded ones on the e-cigarette national page are about $20 a piece.
For my boyfriend and I who are intending this as a stop smoking aid, it seemed like a perfect option. For around $90 we got 3 full e cigs, a carrying case/charger, car charger, usb charger, and 27 carts. We don't intend to use this forever, so it seemed silly to go big guns with fancy toys. For us this is a perfect replacement.