I've only owned the MFLB, then the 'nano, so I can speak to that. HUGE difference in taste, convenience, smell, and I would say efficiency as well.
I can get nearly complete extraction from the 'nano with lighter ABV, and no "burnt popcorn" taste. The MFLB always had dark particles, mixed with lighter ones, no matter how much shaking occurred. ABV from the 'nano is much more even.
Much easier to use; I was instructing the wife of the new owner of my MFLB on how to use it, and she was having a bit of difficulty, the 'nano would be a cinch for her.
The MFLB itself does develop a smell, not so the 'nano.
Unlike some of the other units mentioned the 'nano doesn't look like "alien technology" it's just a cute little wood cylinder.
Although a couple of users have had issues, the majority of them are trouble free.
Well, you could do "heaps of glass research", or just get a D020, until you have a better idea of what you want, it works GREAT with the 'nano, is inexpensive, and delivers smooth tasty
giant hits
http://www.dhgate.com/product/d020-bubbler-hand-blown-glass-vase-perc-water/175832535.html
(It comes with a nail/dome/combustion bowl, you would need a "gong" to use with a vape.)
There's a whole thread devoted to inexpensive glass, yes they're directly from China, with some attendant risk, but the prices are stupid cheap, and most of us are super happy with them.
http://fuckcombustion.com/threads/cheap-high-quality-bubbler.5255/page-143#post-542747