anyone tried: RAYSOON RS-S11 Zoom

Looks like quite a nice zoomable 18650 flashlight, anyone tried it?

http://dx.com/p/raysoon-rs-s11-cree-xm-l-t6-900lm-5-mode-white-light-zooming-flashlight-brown-1-x-18650-162253

It looks decent enough. Unique color. However, without knowing how much amperage it pulls, there is no way to know if its any good. Most of these lights are underdriven and weaksauce.
This one doesnt have a particularly large lens either so dont expect much throw.

You might look at the first page review of the Sipik 26650 clone. Its a bigger lens flood to throw that seems fairly decent, though not driven hard either. But quality is good.

But under driven means the battery will last longer, isnt that right?

also means it wont be as bright as the higher driven same light

Of course, but in reality do most people need the full brightness of an XM-L?