I did a ton of research before buying my first e-cig equipment (only a month ago), and the overwhelming recommendation here and elsewhere is the eGo/equivalents, and the 510 batteries and a PCC for out-and-about. So, I ordered it all, $140 worth, plus a bunch of juice. I tried cart mods, different attys, different juices, etc.
To use a 510/eGo, you really (in my opinion) have to either use cartos or drip. The carts are a joke, because you have to keep filling them, they leak, they flood attys when too full and starve them when they run out...I never got a satisfactory experience without dripping on a freshly-cleaned atty. So, I developed a routine: charge batteries every night, strictly using the eGo batteries because the 510 batteries last ~45 minutes and die, clean out attys with alcohol, let them dry, and drip on the clean attys. This is nearly impossible while driving, when working, etc. Plus the unit is 'huge' with the eGo battery, making it look like I'm toking a one-hitter. Not good in public.
With the BMF, I carry one complete e-cig, the PCC with the extra battery and two cartos (they are dead simple to fill, and I've yet to have one leak even a single drop of juice), and I'm good for the entire day.
I will not recommend eGo/510 stuff to potential vapers while the BMF is available. I can hand it to a person and know they will get a good vape right off the bat. A new user doesn't want to boil attys and drip juice that gets everywhere. They want a simple system that allows them to quit smoking.