promos are for vapeworld.com ... at least i know the FC-2010 one is, havent used the others.
About the MFLB
This is all in my opinion, which is almost needless to say... but I don't think the MFLB is that great of a choice for you at all. I like mine for what it is and how often i use it (not very, only when i need to be totally stealthy). Here's my reasons why:
-Not a good first vape: The hits are thin and inconsistent compared to most vapes. Some will be incredibly thin and you'll wonder if its working at all, some (towards the end of the trench esp) will be so harsh on the throat that you'll think its smoke. The LBs vary themselves too, i have 2 and one runs a lot cooler than the other. Its just not a exact science with the LB, you need to be able to taste/sense/feel the vapor as your hitting it so you know if youre doing it right, and without some previous exp with other vapes, thats gonna be hard to do. I think that, coming from smoking, the hits the LB provides may seem so weak that it could put you off to vaporizing in general (I'm not just making this up, i had a friend try my LB and he thought it sucked so vaporizing must suck too. A month or so later he actually tried my SSV and got more stoned than he's ever been b4.... take it for what its worth)
-Not a good only vape: I can take herb i vaped in either of my LBs and get easily 3x as much vapor out of it in my silver surfer. This obviously means that it is not thoroughly vaping the herb, at least nowhere near as well as teh SSV can. If someone ONLY had the LB they would have ABV with much more to offer, you need another vape to get that out, unless you plan on making edible or something... meh. Also, as you mentioned, you will have to make sure you have a FULLY charged battery at hand in order to get ideal hits out of it. The company has been talking about a power adapter for a while, but its been so long, who knows when it will actually release. Even then, the other problems will still be present.
-Not so smooth: as i mentioned, when you get vapor off the LB, it can feel harsh. This is largely due to the fact that the LB uses conduction (direct physical heat transfer) rather than convection (heating through airflow) which the other 2 vapes use. The herb in the LB that is touchign the screen will get vaporized and the parts that arent wont. This is why ppl say grind your herb as fine as possible and shake so often. No matter how much you do this, the herb wont be vaporized as evenly as it would iwth convection, you taste the burnt-popcorn flavor of ABV a lot sooner than other vapes. This, combined with the fact that there is a very short path between tthe heatsource and your lips means that the vapor will not be as cooled as it would be after passing through a 3ft hose (and optional waterbong adapter)
About the DBV:
I started with a DBV and i think it was a really good beginners vape - it uses convection, it has a clean air path, and it delivered big hits from teh first inhale i took off it the day i got it in the mail. Totally sold me on vaporization. There were some things with it i didnt like however:
-the angle: Yes, herb WILL fall out of the bowl and into the heatercover, onto the heating element and it will burn, if you bump the DBV while the wands plugged in or if anyone accidentally blows in the whip (its much easier to do than it sounds, 2 of my friends have done it) or even breaths/talks with it close to their mouth b4 they hit it.
-the hot spot: At least with the DBV i had, if you put the wand in and take a big hit and then look in the bowl, there will be one spot (usually towards the bottom side of the bowl) that will be noticeably darker than the rest. Even with frequent stirring (after every hit even) you will notice the taste of ABV early on because of this. You could twist the bowl during your hit (like you do with the silver surfer) to kinda tumble it and let that hot spot touch all surface area evenly, but that is hard to do because of my next complaint...
-the ground glass: Oh, its so great, because it frees up a hand, right? Wrong. The wand gets stuck in the heatercover sometimes, even if you dont twist it in very much. Gets hard to remove it and sometimes while you're trying to you might accidentally dump herb in the heatercover. Its a real pain to stir the bowl after every hit like you should to maintain best flavor with the ground glass connection. After so many times of it getting stuck, you'll start to just put in really loosely, but then it will slip out easily, sometime sjust from the weight of the tubing. I used the hand the ground-glass connection of the DBV freed up to punch myself for not going with my first decision and getting the DBVs slightly more expensive, american-made brother (SSV). I've also heard of otehr DBV owners breaking wands/heatercovers and heating elements trying to get their bowls out.
It was for these reasons that I sold my DBV and bought a silver surfer with a standard (non-ground glass) heatercover/wand set. The angle of the SSV makes it so NO HERB EVER has dumped into the heater cover. If you get the standard connection like i did, the heatercover has a much smaller hole so blowing herb into it is really hard to do, in fact i would say impossible to do accidentally. This narrower opening DOES translate into a narrower stream of air and therefor if you just hold your bowl up to it and start inhaling, it will vape some parts more than others too. But with the SSV wand and how its designed, you twist and work the bowl during your hit to direct the stream of air to all parts of the bowl. Much easier to stir after each hit w/o having to wrestle with the ground glass. SSV bowls also taste good up until near the very end, no ABV taste early on like with the LB and DBV.
As far as teh vaporbros, i've never owned/used one so i cant say for sure. But i chose the DBV over it because they seem to function the same way, only the VB has an even less ideal of an angle to it.
So there you have it, my
... actually i think that was more like $.10 at least
But anyways, i'm not trying to bash the LB or the DBV, they both (esp the dbv) got be vaked plenty of times and they do their job, just not without some issues. I couldnt think of a better PORTABLE vape than the LB (but i can easily imagine how one could be made). I'm just trying to save you from having to learn about these things the hard way. I would have saved myself a decent amount of money if i would have just forked over for the ssv right off the bat.
You might also want to look into the Herbalaire 2.1 and the Purple Days (and WDZ/MZ + other log vapes like PD). I havent tried either, but they are well liked by the members who own them on this forum. I plan on ordering a HA in the near future (not because i'm unsatisfied with my current vapes though this time, i just want a bag filler and something rugged for in teh car).