My personal opinion is save up a little longer and get a vaporshark.
With the Chinese holiday and all, I pulled the trigger and purchased a Vaporshark DNA200 as well, while waiting for my replacement VTBox200.
The Vaporshark DNA 200 lasted 8 days.

I would no longer charge or fire, USB connected or not. Good thing is: American chip, American vendor, American store. I went back to the store and they replaced it on-site.
After a few charges, it seems that the LiPo does indeed change character somewhat. From the 900Mah in the Vaporshark, I get more or less the same life as a pair of 18650's in my Cloupor T8. From 8am, it cuts out at around 3-4pm. USB charging is nice, but not spectacular: On a high speed charger, the VS charges in a bit less than 2 hours from dead to full, pulling (according to it's display) approximately 1.1-1.2A.
Still waiting for my replacement VTBox200. I hope that the battery last me just a bit longer, but we'll see.