Ordered mine last week and got it today.
It was shipped on the 11/30 as promised.
This thing works great as reviewed by Mobyghost.
The one description I never saw was a comparison to a stock 510. (I have a 510 Bartleby) Here it goes:
Taste:
The 510 BB tastes like a great hit on a stock 510. The difference is it is more consistent. Each hit is the same as the last and longer hits produce more vapor than stock.
Size / Weight:
It is bigger and heavier than a stock 510. It is not heavy by any means. Since it is not shaped like a pen you can't hold it in your hand and use your hand to do something else such as move a mouse. The button is large and easy to find, and it is obvious which end of the device is "up." A stock 510 in all one color can be confusing in the dark.
Battery life:
I don't know exactly. It has already out lived a stock battery. It is nice not to worry about it being dead when you pick it up, or having to get up and swap out batteries.
If you use the passthrough I imagine the PV would be fully charged when you unplugged it. This would mean you have a few hours without needing to mess with batteries.
Value:
There is a lot of bang for your buck here. The BB replaces 2-3 stock batteries, 1-2 chargers, and probably a 510 PCC. Fully assembled the BB costs about the same as the parts it replaces but works better.
Cons:
The only thing I dislike so far is the red led. It is too bright and distracting. I can't see the reflection of the green light if the red led is on. This is a very minor gripe of course. I'll get used to it.
Summary:
Buy one. It's a great way to spend $50 if you don't need shiny stainless steel.
-Gooney0