I love my mflb and use it almost exclusively. I've used it on the same couch as other people, while watching a movie, and no one noticed (been in dozens of situations like that). As far as solo, portable usability is concerned, I've yet to find an apparatus I like better.
Replacement batteries (usually buy more every 4-6 months, just to keep them fresh):
Amazon.com: Powerex AA 2700mAh NiMH Rechargeable Batteries w/holder- 4 Batteries Per Pack: Camera & Photo
Grinder/container I use:
http://www.vapeworld.com/grinders/s...large-3pc-space-case-scout-grinder-stash-case
I don't really get the burnt popcorn smell unless it gets pulled too hard, or if you take too big of a hit
Also, you can keep the stuff you've already vaped, and smoke it regularly, or use it to make edibles, as the THC in it becomes activated after vaping.
My friend has one of the butane ones (not the wispr), which is better for groups of people, but keeping a bottle of butane handy seems like a pain in the dick.
And yes, totally wind proof. I use it on the bicycle every now and then (one hand operation is also awesome).
Also, I use it without the straw.