I have two of the original lux version of this light ("LILL" bought from DX). It is direct drive, so is rather dim on primary CR123A compared to 3.7V RCR.
FYI, I modded one with a cree, one with a SSC. No matter how I adjusted the reflector, the cree'd version still produced a rather ringy beam. However, I still prefer the cree mod over the SSC - the SSC is very smooth, but has a very tight and narrow hotspot. I prefer the broader hotspot of the cree. Of course, they may have altered the reflector on this version to compensate.
Build quality on the first one I bought at DX last fall was quite good - anodized threads (so you could lock out tailcap), excellent switch, etc. In fact, the tailcap on this version fit on my D-mini (and gave me a 2-stage switch while I waited for lumapower to come out with one). The second one (bought this spring at DX) is of cheaper construction (no anodizing on threads, cheap switch, etc.). The tailcap threads no longer match the D-mini.
Certainly nowhere near D-mini quality, but not bad as a "poor man's D-mini", especially if you plan to use RCR.