In lieu of a lengthy review of the eGo-V LCD Variable Voltage Passthrough I bought from ecig-parts.com, I'll just say that I really like it a lot. I like the wide range of voltages available (3v-6v in .1v increments). I like being able to see the voltage I'm set at and remaining charge with a glance at the LCD. I like being able to plug in the USB cable to charge it without having to remove the cone and DD (i.e. atty/carto/tank).
I don't like the flush-mount fire button. I can't just feel for the button so I have to look at the device to find it...maybe I'll get used to it soon.
I also don't like the fact that the cable is not a standard mini-USB, but I do have a digital camera that uses the same connection, so I have a backup if necessary.
Kudos to ecig-parts.com for getting it to me so quickly! I ordered it Tue, Oct 9, 2012 at 5:41 PM, and it was in my mailbox on Fri, Oct 12, 2012 at 1:00 PM. Fastest shipping I've seen lately, and I'm completely satisfied with their service.