I just got a couple of these and was quite impressed. Received both cells at 3.81v, charged them to 4.18v and discharged both at 1.0 amp to 3.0v. The first cell registered 857mah. The second came in at 809mah at the same 1.0A discharge. Not too bad, they both beat my AW IMR 18350 by over 100mah.
This is the cell
http://www.fasttech.com/products/1420/10002173/1429008-trustfire-imr18350-3-7v-800mah-unprotected
http://dx.com/p/trustfire-18350-3-7v-800mah-lithium-batteries-red-black-2-pcs-237225