18650 series

Hi Everybody, Does anyone have any experience with the 4 - 1 esc brains?" http://www.ebay.com/itm/271648206601 It wont be that specific one, but i was going to use two of them rather than 8 x esc for x8 config? My reasoning was to cut down on alot of wiring. I am exploring the idea of 18650...