Sky Ray S2, Rook like, Single 26650, or 18650

http://www.lightmalls.com/sky-ray-s2-desert-yellow-1xcree-xm-l-t6-1800-lumen-5-mode-led-flashlight-1x18650-1x26650

I have always wanted a FF Rook, then I saw this, but know nothing about it. So does anyone have one of these, and anything to say about it?